Enter your mobile number below and we'll send the download link straight to your phone.

Warning: You're currently on an Android device, click the Google Play store button to be sent directly to the app.

+44

Enter your mobile number below and we'll send the download link straight to your phone.

Warning: You're currently on an iOS device, click the App Store button to be sent directly to the app.

+44

How to re-pressurise a boiler?

7 Answers

Answered by S3 Heating and Plumbing

22nd August 2019

S3 Heating and Plumbing answered the question "How to re-pressurise a boiler?"

Re-pressurising a boilers heating circuit is very simple to do. The majority of boilers have an external filling loop which is already connected or needs connecting to the filling valves. Turn the knobs and fill the system to between 1.0 and 1.5 bar pressure. Don't over pressurise it as this will cause problems of its own. Some of the newer boilers have a built in filling loop which is simply just a little spring loaded lever, again just top up 1.0 to 1.5bar pressure (normally the green area on the guage). If you find that your are topping up the pressure on your boiler regularly then you will need a Gas safe engineer to check your system as something is wrong for it to keep losing pressure. Also introducing too much fresh water to your heating system without an inhibitor isn't good too! If in doubt get an engineer to have a look.

Answered by Tom Sutton Heating

27th June 2019

Tom Sutton Heating answered the question "How to re-pressurise a boiler?"

Re pressurising a boiler is a relatively simple task. Some boilers will have a built in filling loop. In this case it is best to refer to the manufacturers instructions which will guide you through the process. On your boiler you may have a filling loop between two pipes underneath the boiler. The filling loop can usually be identified by a braided hose that connects to valves. To re pressurise the boiler you will need to open one of these valves fully and then slowly open the second valve. When you gradually open the second valve you will hear water filling the system, at this stage keep your eye on the pressure gauge and close off both valve once the pressure has reached 1 to 1.5 bar.

Answered by DLM GAS Ltd

25th June 2019

DLM GAS Ltd answered the question "How to re-pressurise a boiler?"

Re-pressurising your boiler is usually a pain free and simple task that can be performed by a confident customer. The location of the filling loop and pressure gauge will need to be identified. A heat only or system boiler will have an external filling loop, remote from the boiler. A combination boiler can be remote also, but many modern combis have built in filling loops located immediately under the appliance. If you have a built in, or integral, filling loop consult the user instructions for your boiler. It is important, for the sake of consistency, to perform this each time when the system is cold. Temperature in the heating system will lead to differing readings on the pressure gauge as the water is subject to thermal expansion. For an external filling loop, connect the flexible filling loop, open one isolation valve and then slowly open the other valve. These are typically quarter turn thumb taps with black handles. Carefully monitor the pressure gauge while topping up the pressure. You are aiming for between 1-1.5bar cold. DLM Gas are here to help, if you are struggling with re-pressurising your heating system or combi boiler, we would advise to contact a professional heating engineer.

Answered by BoilerOne

24th May 2019

BoilerOne answered the question "How to re-pressurise a boiler?"

To re-pressurise your boiler you will need to find the filling loop arrangent, normally 2 valves, open 1st valve and then watching the pressure gauge, slowly open the 2nd valve to allow pressure to reach between 1bar and 1.5bar. Restart the boiler, if this does not work BoilerOne recommend you consult a gas safe registered engineer to diagnose the problem.

Answered by JMW Heating & Plumbing Ltd

21st May 2019

JMW Heating & Plumbing Ltd answered the question "How to re-pressurise a boiler?"

Pressurising your boiler is a simple task. On your heating pipework (below the boiler normally) there will be a silver/ threaded hose linking 2 pipes(cold water and return) On there you’ll see two black levers on each side, turn the lever inline with the pipework then you should hear the water flowing through. Wait until the dial reaches 1-1.5bar depending on the size of house then turn off the black levers.

Answered by Cliff Plumbing & Heating Limited

6th March 2019

Cliff Plumbing & Heating Limited answered the question "How to re-pressurise a boiler?"

You should re pressurise your boiler to 1-1.5bar or as per manufactures instructions. Usually there is an external filling loop under the boiler (silver flexible hose with small lever valves) to fill the system. Open them up slowly one at a time to make sure you do not over pressurise the system as this could cause problems to the boiler or heating system. You may have a built in filling loop valve under the boiler connected to the inlet valves on the boiler, follow the manufactures instructions for this type.

Answered by Thoroughbuild UK Services Ltd

26th February 2019

Thoroughbuild UK Services Ltd answered the question "How to re-pressurise a boiler?"

Open the filling loop up to re-pressurise the boiler. Some boilers have an internal filling loop and some have an external one adjacent to the boiler. If you are unsure, as always refer to the manufacturers instructions or contact your installer for more guidance and help with this.

Find a trade