Will the High Wycombe pipeline work affect my sewer?

Water Corporation says it is laying the pipeline in stages and will notify surrounding owners and tenants as details become available. If a fixture backs up in the meantime, a drain specialist can tell whether the blockage is in your pipes or in the main.

Do I get a certificate for a new hot water system?

Yes. Installing or replacing a water heater is major plumbing work in WA, so the licensed contractor must give you a certificate of compliance within five working days of finishing.

Plumbers in High Wycombe: new sewer main, new builds and leaks

Plumbers in High Wycombe Growing, and mostly houses.

High Wycombe is in the City of Kalamunda, and Water Corporation is laying a large new wastewater main through the area to keep up with growth. That main is Water Corporation's; the pipes on your side of the sewer junction stay yours. Describe the job and we'll find a licence-checked plumber who specialises in it, whether it's a drain, a leak or a new connection.

What's particular to High Wycombe

Almost entirely houses

At the 2021 Census, 96.2% of occupied homes in the suburb were separate houses, with 3.6% townhouses or semis. 45.7% were owned with a mortgage and 21.9% rented.

A new wastewater main

In March 2026 Water Corporation began laying 830m of DN600 wastewater pipe from Sultana Road West along Milner Road, under the drainage reserve and on to Dundas Road. It's going in by trenchless methods, with delivery listed as late 2026.

Why it's being built

The pipeline is for continued growth in the City of Kalamunda and the new Forrestfield Railway Precinct. Separately, the City's High Wycombe South Structure Plan guides a new residential precinct near High Wycombe Station.

Sewer or an approved system

The City of Kalamunda requires every building that produces wastewater to connect to main sewer or an approved effluent system, and new homes on vacant land to connect to water and sewer where available.

Pools, sheds and extensions near a sewer line

Water Corporation's written approval is needed before anyone drills, bores, excavates, fences or plants near its services. Smaller sewer reticulation pipes are the Water Corporation asset most often found on private land, so a sewer line can cross a back yard.

Before a pool or extension is set out, ask the plumber to pull the Before You Dig Australia plans, which show mains and sewer junctions. A drawing of your own house drains, known as a flimsy, can be obtained from the Building Commission.

New home, new paperwork

Larger plumbing jobs in WA count as major work. The contractor lodges a notice at least 24 hours before starting and owes you a certificate of compliance within five working days of finishing. Putting in or replacing a water heater is major work; repairing existing pipes is not.

Ask for the licence number too. A WA plumbing contractor has to print it on ads, quotes and invoices, and the WA Online Licence Search confirms it.

Water leaking near the meter

At a single detached home with its own meter, the dividing point is the plumber's elbow. Water escaping between that fitting and the road is Water Corporation's to repair; between it and the house, it's yours.

To test for a hidden leak, Water Corporation says to turn off every tap and appliance, note the 3 red numbers on the meter, then check again 15 minutes later. Movement means a leak. See leak detection in Perth, blocked drains in Perth or an emergency plumber.

What we would do

If a pool, shed or extension is on the cards, find out where the sewer runs on your block before the layout is locked in. Water Corporation has to approve digging near its pipes, and moving a design on paper is easier than moving it on site. Then we'll match the work to a plumber who specialises in drainage and new connections.