Higher water bills, damp patches, mould you cannot explain, a meter that ticks at 3am. Seven signs of a hidden leak and what a plumber actually does to find it.
Most water leaks announce themselves loudly — a burst pipe, a dripping ceiling, a soggy carpet. The ones to watch for are the quiet ones. A pinhole leak in a copper line behind a wall can run for months before anyone notices, racking up the water bill and rotting the framing on the way.
The seven signs
- Water bill has jumped without any change in household use.
- Damp patches on walls, ceilings or skirting that come back after you wipe them.
- Faint sound of running water when nothing is on (best heard late at night).
- Mould or peeling paint in places that should be dry.
- Warm patches on the floor over hot-water pipework.
- Toilet that hisses or refills on its own (a leaking cistern can waste thousands of litres a week).
- Mains water meter that keeps ticking after you shut every internal tap.
The meter test
The most reliable home test: turn off every tap, dishwasher, washing machine and toilet in the house. Walk out to the water meter at the boundary. If the dial is still moving, water is being lost somewhere between the meter and the fixture. It does not tell you where, but it tells you something is wrong.
How a plumber finds it
Once a leak is confirmed, a licensed plumber uses leak-detection equipment to locate the source without cutting open walls or floors. The two most common methods on the Kapiti Coast are acoustic detection (a sensitive listening device picks up the high-frequency sound of escaping water through pipework) and thermal imaging (warm hot-water leaks show up as bright lines on a thermal camera). Combined, they typically locate a leak to within a few centimetres.
Why catching it early matters
A hidden leak that runs for three months can do more damage than a one-off burst pipe. Soaked framing rots, plasterboard delaminates, mould spores spread through the wall cavity. Insurance will sometimes cover the resulting damage but rarely the leak itself, and the longer it has been running the more they push back. Acting on the first sign is always cheaper.
Phone Tony if any of the seven signs is happening at your place. Leak detection is a routine call — most are found in under an hour.