VP Plumbing & Drainage Test
Water Pressure, Drains & Hidden Leaks (2026)

Why test the plumbing at key collection

A new home's pipes have usually never carried water under daily use. Joints that were never tightened, traps that were set high, drains laid with too little fall and cisterns that were never adjusted only show themselves when water runs. Key collection is the cheapest moment to find them: the unit is empty, nothing has been renovated, and ClickBina's defect liability period guide lists leaking pipes, blocked drains and defective fittings supplied by the developer among the defects it must repair.

Looking is not enough. A dry pipe does not leak and an unused drain does not back up. The tests below take an hour or two for a typical home and need nothing more specialised than a bucket and a torch.

What to bring and how to plan the test

Bring a bucket, a torch, a roll of tissue, masking tape and a pen to label each point, and a phone with the date stamp on. Ask the developer's representative where the main stopcock and the water meter are before you start; you will need both. Work room by room from the top floor down, so that water from an upstairs test does not confuse a downstairs one. Keep a running list as you go, or tick your defects room by room and add the plumbing items to the same list.

Run every point, hot and cold

Open every tap, mixer, shower, bidet spray, washing machine point and outdoor tap in turn, fully, on hot and cold separately where there is a mixer. Watch the flow and look under the basin or sink while it runs, at the angle valve and the flexible hose behind it; the pressure-reducing valve guide notes that flexible hoses are a common failure point on their own. A point that is weak on its own, while others nearby are strong, is usually a local fault; every point being weak is a supply issue. Label anything that drips, spits or does not run at all.

Water pressure: too weak or too strong

Pressure problems go both ways. Weak water at the top of a house may need a pump, which the developer may or may not have supplied. High pressure shows as pipes that bang when a tap or washing machine shuts off, taps that spit even when opened a little, and flexible hoses that bulge. The same guide explains that a plumber measures pressure by fitting a gauge to an outdoor tap or test point with all other taps closed, and that the right setting depends on what your fittings and water heater are rated for, not on a single magic number.

In a condo, the risers, the zone pressure-reducing stations and the pump sets are usually common property run by the management. If several units on the same floors have the same problem, report it to the management as well as the developer.

Drain speed and floor traps

Fill every basin and sink and pull the plug: the water should go straight down without gurgling or rising in another trap. Then pour a bucket down each floor trap and gully. ClickBina's handover water-damage check calls this the flow test and lists backflow, gurgling and slow clearance as the signs to note. Pour water at the far corner of each bathroom, yard and wet kitchen floor too: it should reach the trap and leave nothing behind. Poor falls are one of the defects easiest to claim while nothing has been changed.

Note any drain smell as well, but do not try to diagnose it on the day; record where and when it appears.

Toilets and cisterns

Flush each toilet two or three times. A good flush clears the pan in one go and the cistern refills and stops. Note a weak flush, a cistern that keeps running or hissing after it should have stopped, water seeping at the base of the pan, and a toilet that rises before it drains, which points to a blockage downstream. A running cistern also spoils the meter test, so fix the order: toilets first, meter last.

The water-meter test for hidden leaks

This is the one test that finds water you cannot see. Close every tap and every appliance that draws water, and make sure no cistern is refilling. Read the meter, including the small dial that moves first, and record it. Wait without using any water; ClickBina's concealed pipe leak guide suggests an hour. Read it again. If it has moved, water is escaping between the meter and the outlets, most likely from a pressurised pipe in a wall or slab. That is a defect to list straight away, even if no stain has appeared yet.

If the house has a hot-water system, close the heater's inlet valve and repeat: if the meter stops, the leak is on the hot side.

Hot-water points

Where the developer supplied water heaters or hot-water piping, run each hot point until it is hot and check that the heater switches on. A warm patch on a floor or wall, or a heater that cycles on when nobody is using hot water, are signs of a hot-line leak. A relief valve that drips is a safety device doing its job; note it for a plumber to check, and never block it.

Signs of blocked or back-falling pipes

Some faults only show when several outlets run together. Run the shower and the basin in the same bathroom, then a washing machine point and the yard trap together. Water rising in one trap while another drains, gurgling after the water has gone, and a floor trap that clears slowly every time point to a waste pipe laid with too little fall or partly blocked with construction debris. Under a bathroom, ClickBina's floor trap and pipe penetration guide explains how to tell a trap leak, which responds to use, from a supply leak, which runs day and night.

Writing it up for the developer

Give every fault a number, the room, the exact point (for example: basin mixer, master bathroom, cold side) and what you saw, with a dated image or a short video of the slow drain or running cistern. Send the list in writing and keep proof of delivery. The developer is responsible for the items it supplied and installed; anything you add later is yours. ClickBina's crack guide notes that the statutory sale and purchase agreement requires the developer to make good within 30 days of receiving your written notice. Ask for any wet-area repair to be water-tested before you retile or fit a shower screen.

When to call leak detection, and what repairs cost

Call in leak detection when the meter moves and nothing is visible, when a stain appears below a wet area, or when the developer's repair has not stopped the water. The leak detection guide explains the visit. For the whole unit, ClickBina also offers a defect inspection service in KL & Selangor, with the plumbing tests above included in the walk. These published ClickBina figures cover the repairs that follow once a fault is yours to fix (indicative 2026, Klang Valley):

How ClickBina can help

WhatsApp us your unit type, size and VP date for an inspection quote. ClickBina is an experienced KL & Selangor contractor for whole-house refurbishment and trade coordination, so plumbing, waterproofing and tiling faults found at VP can be quoted together if the developer does not put them right. We reply within the hour, and the price agreed is a flat price with no hidden charges. ClickBina is registered with SSM. A site visit to quote repair work is RM150, waived if you go ahead with the works; it is not the inspection fee.

Sources & methodology

• ClickBina defect liability period guide — plumbing and developer-supplied fittings as DLP defects, the 24-month period, the tap and toilet checks.
• ClickBina handover water-damage check — flow test on floor traps, pour test, meter test, leak detection price.
• ClickBina pressure-reducing valve guide — signs of high pressure, how pressure is measured, condo zones, repair prices.
• ClickBina concealed pipe leak guide — the meter test and the hot-line check.
• ClickBina floor trap and pipe penetration guide — telling a trap leak from a supply leak.
• ClickBina cracks in a new house guide — the 30-day make-good period.

Methodology: every RM figure is quoted unchanged from the ClickBina guide named beside it; they are indicative Klang Valley ranges for 2026. No pressure figure is given, because the right setting depends on the maker's rating for your fittings.