Best Plumbers in Wellington

Why a Good Plumber Matters in Wellington

New Zealand does have mandatory licensing for plumbers — unlike some trades, you cannot legally carry out sanitary plumbing, gasfitting, or drainlaying work without a current practising licence from the Plumbers, Gasfitters, and Drainlayers Board (PGDB). That is the good news. The bad news is that licensing establishes a floor, not a ceiling, and the gap between a plumber who meets the minimum legal standard and one who does consistently excellent work is wide.

Wellington is arguably the most demanding plumbing market in New Zealand. The city sits on one of the country's most active seismic fault lines — the last major rupture on the Wellington Fault was around 300 to 500 years ago, and GNS Science estimates a 10% probability of a major rupture within the next 100 years. That reality shapes everything about how plumbing and gas systems must be installed here: hot water cylinders need seismic restraints, gas pipework needs flexible connections, and any plumber working in Wellington needs to understand what happens to pipework when the ground shakes.

Beyond the earthquake risk, Wellington's housing stock creates its own set of challenges. The city is home to one of the highest concentrations of pre-1960s homes in New Zealand — suburbs like Mt Victoria, Thorndon, Kelburn, Karori, Brooklyn, Island Bay, and Wadestown are dominated by 1920s bungalows and early-1900s villas, many still running on original galvanised steel pipes that have been corroding from the inside out for close to a century. These pipes progressively narrow until the hot water pressure at your shower is a trickle, and you are wondering whether the cylinder is dying when the real problem is the 90-year-old pipework feeding it.

Then there is the terrain. Wellington is built on hills — steep ones. Homes on sloping sites in places like Khandallah, Ngaio, Northland, and Roseneath sit on sections where drainage is not a nice-to-have but a structural necessity. Poorly managed stormwater and subsoil drainage in Wellington's clay-heavy soils creates hydrostatic pressure behind retaining walls, and that pressure — combined with the city's annual rainfall exceeding 1,200mm in many suburbs — is the single biggest cause of retaining wall failure in the region. A plumber who understands hillside drainage is not just fixing a blocked pipe; they are protecting the ground your house sits on.

A standard callout in Wellington costs somewhere between $95 and $280 for the first hour during business hours, with hourly rates after that typically running $90 to $165 plus GST. After-hours emergency callouts can push to 1.5 to 2 times the standard rate. That callout fee is modest compared to the cost of a burst galvanised pipe flooding your 1920s bungalow, a blocked hillside drain undermining your retaining wall, or a gas leak in a house that was never seismically restrained.

How We Researched This Guide

We spent time on the websites of Wellington plumbing companies to understand how they structure their pricing, what they specialise in, and how they communicate with customers. We reviewed the Plumbers, Gasfitters, and Drainlayers Act 2006 to confirm legal licensing requirements, checked the PGDB public register to understand licence types, and researched Master Plumbers membership standards including the $20,000 residential guarantee. We also read Wellington City Council's Water Services Bylaw 2024, the Backflow Prevention Containment Policy, GNS Science publications on the Wellington Fault, and MBIE's updated Building Code guidance on seismic restraint of storage water heaters to make sure we were not passing on anything unverified about compliance obligations.

Our Trusted Plumbers

We feature businesses that demonstrate strong performance, proven experience, and consistently positive customer feedback. Some of the providers listed may have commercial relationships with us, but all are selected based on quality and reliability.

To begin, reach out to them and speak with them directly — this helps you explain your job, ask questions, and confirm whether they're the right fit.

NZ Plumbing Licences — What Actually Matters

Plumbing is one of the most tightly regulated trades in New Zealand, and the licensing system is worth understanding before you pick up the phone. It is governed by the Plumbers, Gasfitters, and Drainlayers Act 2006 and enforced by the PGDB.

Certifying Gasfitter and Certifying Drainlayer are separate licences issued by the same Board. Many plumbers hold multiple — a plumber who is also a certifying gasfitter can handle your hot water cylinder swap, gas cooktop installation, and issue the legally required Gas Safety Certificate all in the same visit. A plumber who holds only a plumbing licence cannot legally touch gas pipework — they would need to subcontract that portion. In Wellington, where gas pipework needs seismic-grade flexible connections and compliance with AS/NZS 5601.1, you especially want a single licensed professional who can manage both sides of the job. Always check exactly which licences the person arriving at your door actually holds.

Annual CPD is mandatory. Every licensed plumber must complete continuing professional development each year to renew their practising licence. If a plumber's licence has lapsed, they cannot legally do any restricted plumbing work. You can verify any plumber's current licence status, licence type, and disciplinary history on the PGDB public register at pgdb.co.nz — it takes 30 seconds, and it is free.

Master Plumbers — the industry body, not a regulator. Master Plumbers is a membership organisation, not a government body. To join, a business must employ a certifying plumber, gasfitter, or drainlayer who has been running their own business for at least six months. Members go through a quality assurance process — an interview and a business review — and must adhere to a code of conduct. The key consumer protection is the 12-month residential Master Plumbers Guarantee, which covers up to $20,000 for substandard workmanship and protects advance payments if the contractor goes into liquidation. Master Plumbers members must also hold public liability insurance. It is a useful quality signal, but it is not a government licence — plenty of excellent non-member plumbers do outstanding work.

Wellington Plumbing Pricing — What You Can Expect to Pay

Plumbing prices in Wellington sit at the upper end of the national range, comparable to Auckland. Demand is consistently high, CBD parking costs and steep-site access equipment add overhead, and the mix of property types — from hillside villas on pole foundations to modern apartments in Te Aro — means few jobs are straightforward. The figures below are for standard business hours (generally Monday to Friday, 7 am to 5 pm). After-hours, weekend, and public holiday rates are significantly higher.

Price ranges verified from multiple Wellington plumbing provider websites and industry cost guides as of August 2026. Final quotes depend on property access, job complexity, materials required, and whether the work falls within standard business hours.

What drives the price. The biggest variables in Wellington are access difficulty, the age of the home, and whether seismic restraints are required. A tap washer replacement in a ground-floor Thorndon apartment is a 20-minute job. A hot water cylinder replacement in a hillside Karori home where the cylinder cupboard is up a narrow staircase, the old cylinder needs a seismic restraint upgrade, and the galvanised pipe connections have rusted solid is a half-day job. Plumbers in outer suburbs like Johnsonville, Tawa, and the Hutt Valley may charge slightly different callout fees depending on travel distances. After-hours callouts — particularly on weekends and public holidays — can push to 1.5 to 2 times the standard rate.

Fixed price versus hourly. Some plumbers quote fixed prices for common jobs (hot water cylinder replacements, toilet installs, gas cooktop connections). Others charge time and materials. A fixed-price quote gives you certainty — the price is the price regardless of how long the job takes. An hourly rate can work in your favour for small, straightforward tasks but carries an open-ended risk for more complex work. In Wellington's older homes, where you never quite know what is behind the wall until you open it, a fixed price from a plumber who knows the local housing stock is worth its weight.

GST is usually additional. Most plumbing quotes exclude GST. A $3,500 hot water cylinder replacement is actually $4,025 including GST. Check whether the quote is GST-inclusive or exclusive before comparing prices.

How to Choose a Plumber — What Actually Matters

Licensing gets a plumber through the door legally. Beyond that, what separates a plumber you would call again from one you would not comes down to a few specific things — and in Wellington, seismic awareness is high on that list.

Check their licence — actually check it

The PGDB public register at pgdb.co.nz lets you verify a plumber's current licence status, licence type, and any disciplinary history in 30 seconds. You need their licence number or full name. Look for a certifying licence (not just a limited certificate), confirm the licence is current (not expired), and check for any disciplinary action. If a plumber hesitates to give you their licence number, that tells you everything you need to know.

Experience with Wellington's older housing stock

A plumber who has worked across Wellington for years understands what is hiding in different eras and suburbs. A 1920s bungalow in Mt Victoria may still have sections of original galvanised steel pipe that have corroded to half their internal diameter — you get a trickle from the hot tap even though the cylinder is fine. A hillside villa in Wadestown probably has low-pressure hot water with a header tank in the roof space, and converting to mains pressure means checking whether the existing fittings can handle it. A 1970s-80s home in Johnsonville or Newlands is a candidate for Dux Quest plumbing. An apartment in a converted Thorndon character building may share drainage with multiple units, meaning a blockage in one affects everyone. A plumber who has seen these patterns hundreds of times spots things a less experienced plumber misses — and in Wellington's old homes, what you cannot see is usually the expensive part.

Whether they understand seismic restraints

This is the Wellington-specific question that matters most. Under the New Zealand Building Code clause B1 Structure, all building elements — including plumbing and gas systems — must be adequately restrained against earthquake forces. MBIE's updated Acceptable Solution G12/AS1 now explicitly clarifies the requirements for seismic restraint of storage water heaters. The objective is to prevent your hot water cylinder from toppling, sliding along the wall, or pulling its pipe connections apart during an earthquake. Gas pipework under NZS 4219:2009 and AS/NZS 5601.1 requires flexible connections at anchored equipment so the pipes can move independently without rupturing. A plumber installing or replacing a hot water cylinder in Wellington should be able to tell you exactly how they are restraining it — the fixings they use, the strapping to the wall framing, and the flexible pipe connections that allow movement. If they look blank when you ask about seismic restraints, find another plumber.

Whether they do both plumbing and gasfitting

Many Wellington plumbing companies also hold gasfitting licences. If you need a gas cooktop installed, a gas hot water system replaced, or a Gas Safety Certificate for a property sale, a plumber who holds both licences means one callout instead of two. The PGDB register shows both licence types. Look for "Certifying Plumber" and "Certifying Gasfitter" on the same person or company. In Wellington, where gas installations must comply with AS/NZS 5601.1 and the Gas (Safety and Measurement) Regulations 2010 — and where flexible seismic connections are non-negotiable — this dual-licence combination is even more valuable.

Emergency availability

A burst pipe at 10 pm on a windy Saturday night in Wellington does not wait until Monday morning. Ask what the plumber's after-hours policy is before you need it. Some companies offer genuine 24/7 emergency response — someone answers the phone, a plumber is dispatched, and they arrive within the hour. Others have an answering service that takes a message and calls back the next morning. The price difference on the actual callout is steep (after-hours rates are 1.5 to 2 times the standard rate), but knowing who to call and that they will actually come is worth more than saving $100 on an emergency rate you hope you never need.

Insurance and guarantees

Every reputable plumbing company carries public liability insurance. Ask to see the certificate — any plumber who deflects or hesitates is not worth your time. Master Plumbers members offer the $20,000 residential guarantee as an additional layer. Even if a plumber is not a Master Plumbers member, they should stand behind their work with a written workmanship warranty — at minimum 12 months on new installations. A plumber who will not put a warranty in writing is one you should not hire.

Red flags

• They will not give you their licence number. Walk away. This is not optional — it is a legal requirement to be licensed, and verifying their licence takes you 30 seconds.
• They quote a price over the phone without seeing the job. A blocked drain might be a simple hair clog or a collapsed earthenware pipe in a hillside section. Unless it is a genuinely straightforward job (replacing a known hot water cylinder model like-for-like), a plumber who quotes sight-unseen is guessing — and Wellington's old homes are where guessing gets expensive.
• They cannot or will not provide a written quote. Verbal estimates are not quotes. If the plumber will not put numbers on paper, assume the final bill will be higher than what they told you on the phone.
• They do not know what seismic restraints are or say they are "not needed." The Building Code says otherwise. In Wellington, this is not a niche concern — hot water cylinders must be restrained, gas pipework needs flexible connections, and a plumber who dismisses this is not up to date with their obligations.
• They do not issue a Gas Safety Certificate after gas work. This is a legal requirement under the Gas (Safety and Measurement) Regulations 2010. A gasfitter who does not issue a certificate is breaking the law, and your insurance may be void if something goes wrong.
• They have no online presence — no Google reviews, no website, nothing. In 2026, a service business with zero digital footprint is a gamble. One or two bad reviews among many good ones is normal. Zero reviews at all is not.

What to Expect When You Call a Plumber

Before they arrive. When you call to book, describe the problem as clearly as you can. If it is a leak, say where it is coming from, how fast the water is running, and whether you have turned the water off at the mains toby. If it is a blocked drain, say which drain is blocked and whether multiple fixtures are affected (a toilet and shower both backing up suggests a main sewer blockage, not a localised clog). For Wellington homes, mention anything unusual about your property that affects access — steep driveway, narrow staircases, the hot water cylinder being in a tight cupboard under the stairs. The more detail you give, the better prepared the plumber will be — they will bring the right parts and the right equipment, which means fewer callbacks and a faster resolution.

When they arrive. The plumber assesses the situation, explains what they have found, and gives you a price before starting — either a fixed quote for the job or an estimate with a clear explanation of what could push the cost higher. For simple jobs (tap washer replacement, toilet cistern repair, basic drain clearing), they will usually get straight into it. For larger jobs (hot water cylinder replacement, gas appliance installation, major drain repairs), they may need to assess and return with parts, or quote and book a separate installation day. In Wellington's older homes, be prepared for the plumber to find something unexpected — a section of galvanised pipe that crumbles when touched, a drain joint that has separated on a sloping section, or a hot water cylinder that was never seismically restrained in the first place.

How long common jobs take.

• Tap washer or cartridge replacement: 20–45 minutes
• Blocked drain (jetting or electric eel): 30 minutes to 2 hours depending on access and root severity
• Toilet replacement: 2–4 hours including removal, new pan installation, and testing
• Electric hot water cylinder swap (like-for-like): 3–5 hours including draining, removal, seismic restraint fitting, installation, and refill
• Gas continuous flow unit installation: 4–8 hours depending on whether new gas pipe runs and flexible seismic connections are needed
• Full house replumb: 3–10 days depending on house size, access, and whether you are living in the house during the work

After the job. The plumber tests their work, cleans up, and explains what they did. If the job involved gas work, they must issue a Gas Safety Certificate (confirming the installation is safe to use) and may also issue a Certificate of Compliance (confirming the work meets the Gas Regulations). If the work required a building consent — which some major plumbing alterations do — they should also issue a Record of Work. Keep all certificates — you will need them if you ever sell the property, and Wellington solicitors routinely ask for gas certification as part of the sale and purchase process.

Wellington-Specific Risks — What Your Plumber Should Know

Seismic restraints — the Wellington non-negotiable

This is the single most important plumbing consideration in Wellington, and it is one many homeowners never think about until an earthquake happens. Under the Building Code clause B1 Structure, every building element — including hot water cylinders, gas appliances, and pipework — must be adequately restrained against earthquake forces. The updated Acceptable Solution G12/AS1 now explicitly requires that storage water heaters be seismically restrained to prevent toppling, sliding, or pulling pipe connections apart during seismic movement.

In practice, this means your hot water cylinder should be strapped to wall framing with purpose-designed restraints — not just sitting on a tray with gravity doing the work. Gas pipework needs flexible connections where it joins anchored equipment, allowing independent movement during shaking without rupturing. NZS 4219:2009 sets out the design options for seismic restraint of engineering systems, and while it is being updated (transitional provisions run to 31 July 2026), the core principle has not changed: pipework that cannot move in an earthquake will break.

A plumber working on any Wellington home should check the existing seismic restraints on the hot water cylinder, gas appliances, and large pipe runs as part of any significant job. If they are replacing a cylinder, they should be fitting new restraints as standard — it is not an optional extra. A cylinder that topples in an earthquake dumps 180-plus litres of water into your home, and if it is a gas continuous flow unit mounted on an external wall, a ruptured gas line is an immediate fire and explosion risk.

Post-earthquake water supply is also critical — GNS Science modelling shows parts of Wellington could be without reticulated water for weeks after a major rupture, and a cylinder that survives the shaking intact gives you a household water reserve that could make a material difference.

Galvanised steel pipes — the invisible bottleneck

Before the 1960s, virtually all New Zealand homes were plumbed with galvanised steel pipes. Wellington has an exceptionally high concentration of pre-1960s housing — the villa and bungalow belt stretching from Mt Victoria through Newtown, Berhampore, Island Bay, Brooklyn, Kelburn, Thorndon, Wadestown, Karori, and Ngaio is packed with homes that are 60 to 120 years old.

Galvanised steel corrodes from the inside out. Over decades, rust and mineral deposits progressively narrow the internal diameter of the pipe — a pipe that started at 20mm internal diameter might be down to 5mm or less after 80 years of Wellington's water running through it. Hot water lines are affected first and worst because heat accelerates the corrosion. The result is water pressure that has been slowly dropping for years without you really noticing — you blame the shower head, you blame the cylinder, you blame the council water pressure, but the real culprit is the century-old plumbing inside your walls.

A plumber who knows Wellington's older suburbs can usually identify galvanised pipework by inspecting accessible sections in the ceiling space or under the floor. Full replacement with copper or PEX is the permanent fix, but it is a major job — a full replumb of a standard three-bedroom Wellington villa typically costs $7,000 to $18,000 depending on access and whether the house is occupied during the work. The key is knowing the pipework is there in the first place — and a plumber who does not check is doing you a disservice.

Hillside drainage and retaining wall pressure

Wellington's steep terrain and high rainfall create a drainage environment unlike anywhere else in New Zealand. The city's clay-heavy soils hold moisture rather than allowing it to drain freely, and when water builds up behind a retaining wall — which almost every hillside property has — it creates hydrostatic pressure that the wall was never designed to handle. Poor drainage is the single biggest cause of retaining wall failure in Wellington, and unconsented or poorly designed retaining walls are one of the most common reasons property sales fail in the region.

A blocked subsoil drain on a sloping section is not just an inconvenience — it is a structural threat. Water backing up behind a retaining wall can cause the wall to bulge, crack, and eventually fail, taking sections of garden, driveway, and potentially the building platform with it. Subsoil drains — perforated piping wrapped in filter fabric that channels underground water away from foundations and retaining walls — need to be clear and functioning. A CCTV drain inspection is not just for sewer pipes on Wellington hillside properties; it should cover the subsoil and stormwater drainage as well.

Surface water management matters just as much. Wellington's wind-driven rain hits hillside homes at an angle that horizontal-roof homes in flatter cities never experience. Overflowing gutters, pooling on driveways, and water running down slopes into garages and under houses are common — and they are almost always drainage design problems masquerading as "it rains a lot here." A plumber with hillside drainage experience will look at where the water goes when it leaves your roof and downpipes, not just whether the pipes themselves are clear.

Dux Quest — still in Wellington homes

Black polybutylene pipe installed in New Zealand homes between roughly 1978 and 1987, Dux Quest is widespread in Wellington suburbs that saw construction during that era — Johnsonville, Newlands, Churton Park, parts of the Hutt Valley, and some infill housing across the city. The material chemically reacts with chlorine in the town water supply, becoming brittle from the inside out. Hairline cracks form, joints fail at the acetal elbows, and the pipe eventually splits — often suddenly, often in the ceiling cavity.

If your home was built or substantially renovated during the late 1970s or 1980s and the plumbing has not been fully replaced, a plumber should flag it immediately during any inspection or repair visit. The standard professional recommendation is a full replumb, not spot repairs. Fixing one burst section of Dux Quest simply moves the pressure to the next weakest point.

Many insurers now limit coverage to the first Dux Quest leak or exclude claims entirely, and property sale agreements increasingly require disclosure — if you are buying a Wellington home from this era, a plumbing inspection specifically checking for Dux Quest should be on your settlement checklist.

Water pressure variation — the hill effect

Wellington's terrain means water pressure varies dramatically by elevation. A property in sea-level suburbs like Oriental Bay, Seatoun, or the CBD gets strong incoming pressure — strong enough that a pressure limiting valve may be needed to protect pipe joints, valves, and appliances from premature wear. A property in an elevated suburb like Karori, Brooklyn, or Khandallah may receive noticeably lower incoming pressure, particularly during peak demand periods when the whole suburb is drawing water simultaneously.

Combine low incoming pressure with corroded galvanised pipes and a low-pressure hot water cylinder — which many of Wellington's older homes still have — and you get a hot shower that is a drizzle. A good plumber checks incoming water pressure before installing anything. On high-pressure properties, they should check whether a pressure-limiting valve is fitted and functioning.

On low-pressure properties, they should explain your options — upgrading to a mains-pressure hot water system, replacing corroded pipework, or installing a pressure-boosting pump. A plumber who installs a new cylinder without checking pressure first is skipping a basic step.

Wind-driven rain and external plumbing

Wellington's nor'wester and southerly winds drive rain horizontally into external plumbing fittings, gas appliance flues, and pipe penetrations in ways that vertical rainfall never does. External taps, gas meter connections, and hot water system flues on the windward side of a Wellington home face conditions closer to a marine environment than a suburban one.

Corrosion on external brass fittings, water ingress around pipe penetrations through cladding, and gas flue terminals that take direct wind-driven rain can all shorten the service life of plumbing components. A plumber who works exclusively in sheltered inland suburbs may not give these the attention they deserve. If your home is on an exposed hillside or ridgeline — and many Wellington homes are — ask whether the plumber uses marine-grade fittings where appropriate and checks external pipe penetrations for weathertightness.

Backflow prevention — Wellington City Council requirements

Under Wellington City Council's Water Services Bylaw 2024 and the Backflow Prevention Containment Policy, property owners must prevent the reverse flow of water from private plumbing back into the public water supply. High and medium-risk properties (commercial buildings, multi-unit residential, properties with irrigation systems, swimming pools, or certain industrial activities) require a testable backflow prevention device at the property boundary.

These devices must be tested annually by a registered Independently Qualified Person (IQP), with test results submitted to the Council. Devices within the property boundary must be added to the Building Warrant of Fitness compliance schedule.

A plumber working on any Wellington property should check what backflow protection is in place and whether it complies. If they are installing anything that changes the property's risk profile — a new irrigation system, a secondary water supply, or any equipment that introduces chemicals into the water system — they should flag the potential need for a backflow upgrade before the work starts, not after.

Questions You Might Have

What should I do if a pipe bursts at night?

Turn the water off at the mains toby — in Wellington, the toby is usually at the front boundary near the footpath. If you do not know where it is, find it now, before you need it. Once the water is off, open the lowest tap in the house (usually an outside tap or laundry tub) to drain the remaining water from the pipes and reduce pressure. Then call an emergency plumber.

Most Wellington plumbing companies offer after-hours emergency callouts. If the burst is on the city side of the toby — between the street main and your boundary — contact Wellington Water, not a private plumber. Expect to pay $250 to $400 for the first hour of an after-hours callout rather than the standard $95 to $280.

How do I know if my hot water cylinder is seismically restrained?

Look at the cylinder. If it is an indoor cylinder, there should be metal strapping — usually galvanised steel straps or purpose-made restraint brackets — securing the cylinder to the wall framing. The strap should be bolted or screwed into a stud, not just nailed.

If the cylinder is sitting on a tray or platform with no visible strapping, it is probably not restrained. If it is an outdoor gas continuous flow unit, check whether the gas pipe connection has a flexible section — a loop or corrugated section of pipe that can flex — rather than a rigid pipe run straight into the unit. If in doubt, have a licensed plumber inspect it.

Seismic restraints are a Building Code requirement, and if your cylinder was installed before the current standards or was a DIY replacement by a previous owner, it may not meet modern requirements.

Do I need a gas compliance certificate when selling my house?

Yes. If your property has any gas appliances or gas pipework — a cooktop, a hot water system, a gas fireplace, or even just a disconnected gas bayonet — you will likely need a Gas Safety Certificate before settlement. Wellington solicitors routinely ask for gas certification as part of the sale and purchase process, and insurers increasingly require it.

A standalone gas safety inspection and certificate typically costs $200 to $350 depending on the number of gas appliances. If gas work was done during your ownership and no certificate was issued at the time, you may need the full system inspected and certified retrospectively. Do this well before settlement — discovering missing gas certificates a week before the buyer takes possession is avoidable stress.

Should I replace my hot water cylinder before it fails?

Hot water cylinders in New Zealand typically last 15 to 20 years. If yours is approaching or past that age, replacing it pre-emptively is usually cheaper and far less disruptive than waiting for it to fail — which it will do at the worst possible time, usually on a winter Sunday night when after-hours callout rates apply.

Signs a cylinder is nearing the end of its life include rusty or discoloured water (indicating internal tank corrosion), moisture or puddles around the base, running out of hot water noticeably faster than you used to, and rising power bills with no other explanation.

If you are replacing an electric cylinder, consider a heat pump hot water system — the upfront cost is higher ($6,399 to $10,000 versus $2,000 to $4,500 for a standard electric cylinder), but running costs are roughly a quarter of a standard cylinder ($200 to $400 per year versus $800 to $1,200), which means most Wellington households see payback in 4 to 7 years.

What if I am buying a house and the plumbing worries me?

A standard building inspection includes a visual plumbing check — the inspector will look for obvious leaks, check water pressure at taps, and note the visible pipe materials. But a building inspector is not a plumber. In Wellington, where the housing stock is older and the terrain creates drainage risks that most building reports only touch on, a dedicated plumbing inspection is worth considering. Specifically:

• If the property is from the Dux Quest era (late 1970s to late 1980s), get a plumber to check for black polybutylene pipe in the ceiling and under the floor — this is not something a standard building inspection will flag
• If the property is pre-1960s and has not had a documented replumb, ask the plumber to inspect accessible pipework for galvanised steel and assess its condition
• A CCTV drain inspection ($200 to $500) shows you the condition of the underground drains before you own the problem — especially important on hillside properties where a collapsed drain can mean excavation through a retaining wall
• Check that the hot water cylinder has visible seismic restraints — a cylinder that is not restrained is a compliance issue and a safety risk
• If the property has retaining walls, ask whether the drainage behind them is functioning — a blocked subsoil drain is a future retaining wall failure waiting to happen

Can a plumber install a gas appliance or does it need a separate gasfitter?

It depends on the plumber's specific licences. Many Wellington plumbers hold both a Certifying Plumber licence and a Certifying Gasfitter licence — the PGDB public register shows both. If your plumber holds both, they can handle the water connections, the gas connections, and issue the legally required Gas Safety Certificate all in the same visit.

If they only hold a plumbing licence, they cannot legally touch gas pipework — they would need to bring in (or have you separately engage) a licensed gasfitter. In Wellington, where gas installations must include flexible seismic connections, always confirm licence status before booking. A plumber who says they can "sort the gas too" without holding a gasfitting licence is breaking the law.

What Matters Most

Plumbing is not a trade where you should buy on price. The cheapest quote on a hot water cylinder installation or a drain repair often means corners were cut — an apprentice doing certifying-level work unsupervised, a certificate that was never issued, a material that meets the minimum standard but will not last, a cylinder that was never seismically restrained, or a problem that was temporarily cleared rather than permanently fixed.

In a city built on a major fault line with thousands of homes still running on century-old galvanised pipes, clay soils that hold moisture against retaining walls through every winter, steep sections where a blocked drain is not an inconvenience but a structural threat.

A regulatory framework that requires seismic restraints, backflow prevention, annual testing, and gas safety certificates means a good plumber is not a luxury — they are the person who stops a small problem from becoming a major one, and in Wellington, a major plumbing problem can threaten more than just your water pressure.

Check the licence. Ask about seismic restraints. Get the quote in writing. Ask about their experience with Wellington's specific housing stock — bungalows, villas, hillside sections, galvanised pipes. Keep the certificates. And if your home was built before 1960, ask about the condition of the pipework — even if you called them for something else entirely. A plumber who spots galvanised pipes during a routine job and tells you about them is a plumber worth keeping.