Does a factory or café need Watercare's say-so for its drains?

If it discharges trade waste, Watercare's bylaw applies. Ring its trade waste team on (09) 539 7655 to talk through your processes and risk level.

Who tests the backflow device at our boundary?

The owner arranges it. Watercare installs boundary devices, but the property owner must maintain and test them every year. Auckland Council oversees testing of devices inside the property.

Plumbers in East Tāmaki: homes, workplaces and trade waste

Plumbers in East Tāmaki

Homes and workplaces.

East Tāmaki is a big business district with streets of family homes alongside. Watercare runs water and wastewater for both, and businesses that send trade waste down the drain have extra rules. Tell us whether it's a house or a workplace, and we'll match you with an authorised East Tāmaki plumber who specialises in that kind of job.

East Tāmaki in figures

More workers than households

In February 2025 the East Tamaki statistical area had 4,161 businesses employing 41,900 people. The 2023 Census counted 2,550 occupied homes there.

Factories and warehouses

Manufacturing made up 11.1% of local businesses and wholesale trade 13.4%.

Homes heated without wood

A wood burner was a main heating type in just 0.8% of homes, against 28.2% nationally. 30% of homes have four bedrooms, and 45.2% of households didn't own their home or hold it in a trust.

Few new houses now

New dwellings consented fell from 51 in the year to March 2023 to 1 in 2025 and 0 in the year to March 2026.

Trade waste and backflow

Watercare defines trade waste as commercial and industrial liquid waste sent into its wastewater network, and treats it as higher risk than household waste. It's governed by the Auckland Trade Waste Bylaw 2013 and Trade Waste Control 2019. Before you change a process that puts liquid down the drain, talk to Watercare's trade waste team on (09) 539 7655.

Some sites also have a boundary backflow device at the meter. Watercare installs it, but the property owner maintains it and has it tested every year. See commercial plumbing and backflow prevention.

At home

Residential rules are the same as anywhere in Auckland: from the outlet of the meter, the pipes are yours. A leak in the meter box is Watercare's, and its crews fix those. A blocked drain is one to report to Watercare before calling a plumber, so the public pipe gets checked first.

Nearby

Botany, East Auckland and Manukau. Citywide: blocked drains and leak detection.

What we'd do in East Tāmaki

For a workplace, sort out the paperwork before the plumbing: if the job changes what goes down the drain, ring Watercare's trade waste team first, then book a plumber who does commercial work and can check the backflow device while they're there. For a home, the usual order applies: find whose pipe it is, then book the right trade.