Yes — replacing a washing machine hose is generally something a NZ homeowner can do themselves. It doesn't involve modifying any fixed plumbing, so it falls outside the definition of restricted plumbing work under the Plumbers, Gasfitters and Drainlayers Act. That said, it pays to know what you're doing, because a failed washing machine hose is one of the most common causes of serious water damage in NZ homes.
Is It Legal for Me to Do This Myself?
Under NZ law, restricted sanitary plumbing work must be carried out by a licensed tradesperson registered with the Plumbers Gasfitters & Drainlayers Board (PGDB). However, connecting or disconnecting a washing machine hose from a tap (toby) or hose bib that already exists is generally considered routine maintenance — not restricted work — because you are not altering any fixed pipework.
If your laundry doesn't already have a dedicated washing machine tap and you need one installed, that installation is restricted work and must be done by a licensed plumber. Always confirm with your local council or the PGDB if you're unsure about your specific situation.
What You'll Need
Before you start, gather the following:
- Replacement washing machine hoses (hot and/or cold, typically 1.2 m or 1.5 m braided stainless steel hoses — available at Bunnings or Mitre 10)
- Adjustable spanner or pliers
- A bucket and old towels
- Thread tape (PTFE tape)
Tip: Always replace both the hot and cold hoses at the same time, even if only one has failed. Hoses age together and it saves you doing the job twice.
Step-by-Step: How to Replace a Washing Machine Hose
1. Turn Off the Water Supply
Locate the washing machine taps (usually behind or beside the machine) and turn them off clockwise. If there are no individual taps, you'll need to turn off the water at the toby (main stopcock) — typically near the front boundary or under the kitchen sink.
2. Disconnect the Old Hoses
Place your bucket under the connections. Using an adjustable spanner, unscrew the hose fittings from the taps first, then from the back of the machine. Have towels ready — some residual water will drain out.
3. Check the Fittings and Washers
Inspect the tap outlets and the machine inlets for corrosion or damage. Check the rubber washers inside the hose fittings — these are often the cause of leaks. New hoses usually come with new washers already fitted.
4. Wrap with PTFE Tape (if needed)
If the tap threads look worn or you've had slow leaks before, wrap 2–3 layers of PTFE thread tape clockwise around the male threads before connecting.
5. Connect the New Hoses
Hand-tighten the fittings first, then use your spanner to snug them up — firm but not overtightened, as over-tightening can crack the plastic fittings on the machine. Hot goes to hot, cold goes to cold (hoses and taps are usually marked).
6. Turn the Water Back On and Check for Leaks
Slowly open the taps and watch every connection point carefully for 2–3 minutes. Run a short wash cycle and check again. If you see any drips, turn off the water and re-check the fittings.
Choosing the Right Hose
| Feature | What to Look For |
|---|---|
| Material | Braided stainless steel (more durable than plain rubber) |
| Length | Measure before you buy — 1.2 m or 1.5 m are common |
| Thread size | Most NZ washing machines use 3/4" BSP fittings |
| Burst pressure rating | Higher is better — check the packaging |
Braided stainless steel hoses are strongly recommended over plain rubber hoses. They resist kinking and are far less likely to burst unexpectedly.
Preventing Future Leaks and Water Damage
- Replace hoses every 5–7 years as a precaution, even if they look fine.
- Don't push the machine hard against the wall — kinked hoses fail faster.
- Consider fitting a washing machine flood stop valve (available at plumbing merchants), which automatically shuts off water if a hose bursts.
- If your laundry has a floor drain, make sure it's clear — this is a requirement under the NZ Building Code (G13) for new laundry installations and a good idea in any home.
- NZ's Healthy Homes standards require rental properties to be free from moisture and drainage issues, so landlords should be especially diligent.
When to Call a Professional
Call a licensed plumber (find one on tradedirectory.co.nz) if:
- You need a new washing machine tap or hose bib installed — this is restricted plumbing work.
- The existing tap is seized, corroded, or leaking from the tap body itself.
- You notice water damage, mould, or dampness behind the machine that suggests a longer-term leak.
- You're not confident working with plumbing fittings — a small mistake can cause significant water damage.
A licensed plumber can also advise on whether your laundry setup meets current NZ Building Code requirements, which is worth knowing if you're renovating or selling.