Leaks on your central heating system

Do you have a sealed central heating system ie a combination boiler or system boiler?
Is the pressure gauge regularly reducing from its normal position approx 1 - 1.5 bar down to zero or near zero?
Are you topping up the system pressure more than once perhaps twice per year?
Do you have an open central heating system?

The above issues do point to a leak however there are a few things you may want to get checked put before you engage our services, that said please call us at any time for no nonsense advice. The other issue to bear in mind is that you may have more than one leak; from our experience everyone assumes they have only one leak,

Check the following issues

Your system has a safety valve (or valves depending on the size of the house) installed on it, the safety valve is often referred to in the trade as a PRV (pressure relief valve) and another valve in some instances called a PTRV (pressure temperature relief valve). These valves have a small 15mm copper pipe leading from them which discharges on the outside of the building, find this pipe and if it is wet or is dripping, you most likely have found a leak.

A simple test is too place a balloon over the end of the pipe and leave it there for a 48 hours, when you return if the balloon has water in it, you will need to contact a gas safe (formally CORGI GAS) registered engineer to examine your boiler

If the pressure gauge on your boiler moves up and down when the boiler heats up and cools you most probably have a problem with the expansion vessel in the boiler and/or fitted to the central heating system

If your ‘feed and expansion’ cistern also called a ‘header tank or jockey tank’ are constantly refilling and supplying water into the central heating system, you most probably have a leak

Unvented Hot water Cylinders –

also known as megaflo’s although that is a trade name (similar to how many people call a vacuum a Hoover)

As above – check pressure relief valve (PRV) and pressure temperature valve (PTRV)

How we will find your leak

We find hidden leaks on lead, iron, steel, asbestos (yes believe it or not there are many many asbestos water supplies) and plastic supply pipes

We use:

- Military Thermal Imaging technologies
Acoustic profiling
Acoustic listening devices
Zect leak detection agent – we are the only company in the UK to use this product


Click here to watch our video of how we do it

Ask your building insurer if you have trace and access cover in your policy

Call George Rees – Director of leak detection to discuss your leak issue 0208 492 0077