Waste Disposal Units Wellington

A waste disposal unit sits under the kitchen sink and grinds food scraps into fine particles that wash away with the water. Used well, it keeps scraps out of the bin and the kitchen cleaner. Used badly, or fitted to a drain that cannot cope, it jams, leaks or adds to blocked drains further down the line.

We install, replace and repair waste disposal units in kitchens across Wellington, the Hutt Valley, Porirua and the Kāpiti Coast. Before fitting one we check that the sink, the waste pipe and the power supply suit it, and when an old unit fails we give you a straight answer on whether it is worth repairing.

Pricing: quotes are free, and every job gets a fixed price before we start, so there are no surprises on the invoice.

Waste Disposal Units Jobs We Handle Across Wellington

• Garbage disposal unit installation
• Waste disposal leaking from the bottom
• Jammed disposal units
• Humming waste disposal
• Disposal unit replacement
• Septic-safe disposers

Signs your disposal unit needs attention

Most faults show up in one of these ways:

• Hums but will not spin: usually jammed
• Does nothing at all: tripped reset button, switch or power fault
• Water leaking from the body or the base of the unit
• Leaks at the sink flange or the dishwasher connection
• Slow draining, or water backing up into the sink
• Loud grinding or rattling
• A bad smell from the sink that cleaning does not shift

Repairs and replacements

A humming unit is normally jammed by something hard, such as a bone, a fruit stone or a teaspoon. We isolate the power, free the grinding plate and reset the motor. Leaks from the sink flange or connections can often be resealed. Leaks from the body of the unit usually mean the internal seals have failed or the housing has corroded, and a replacement is the honest recommendation.

When we replace a unit, we match the mounting and outlet where possible to keep the job simple, connect the dishwasher inlet if you have one, and check the fall on the waste pipe so ground food actually travels away rather than settling in the trap.

How It Works

Older drains on Wellington sections

Whether a disposal unit is a good idea depends a lot on the drain it feeds. Many older villas and cottages in suburbs like Newtown, Brooklyn and Kelburn have long runs of original drain, and on hillside sections those runs can be steep in places and close to flat in others. Ground food moves well down a steep pipe and settles where the fall flattens out, especially if grease goes down with it. Roots in old clay joints give scraps something to catch on.

On sections built by cutting and filling a slope, drains can also sag as fill settles, leaving dips where food waste collects. If your kitchen sink already drains slowly or the drain has blocked before, we suggest a CCTV drain inspection before fitting a unit, so you are not adding load to a pipe that is already struggling.

What not to put down a disposal unit

Most problems come down to what goes in. Keep these out:

• Fats, oils and grease, which set further down the pipe
• Stringy food such as corn husks, celery and onion skins
• Large bones and fruit stones
• Coffee grounds and eggshells in quantity
• Anything that is not food

Sewer, septic and businesses

Most homes in Wellington City, the Hutt Valley and Porirua drain to the public wastewater network, where Tiaki Wai now runs the pipes, and a correctly fitted disposal unit is generally fine there. Homes on a septic tank are different: a disposal unit adds solids to the tank, so we only recommend one where the tank is well maintained and sized for it.

Commercial kitchens are a separate case. Food businesses that discharge fats and food waste to the sewer need a trade waste consent, which Tiaki Wai has administered for the four councils since 1 July 2026, and Kāpiti has its own Trade Waste Bylaw. If you run a café or restaurant, talk to us about your grease trap before adding any disposal equipment.

Pricing

Unjamming and resealing sit at the lower end. Supplying and fitting a new unit depends on the model and whether new waste pipework or a dedicated power point is needed. Any electrical work is done by a registered electrician, and the price is agreed before we start.

Why Choose Cheeky's Plumbers for Waste Disposal Units

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Waste Disposal Units Across Wellington

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