If you hear banging noises in your central heating, the radiators on your top floor aren’t working, or your boiler keeps shutting down, you might have low water pressure in your boiler. It’s a common issue which can leave you without hot water. Low pressure is relatively easy to diagnose, as most boilers have a built-in pressure gauge. Your boilers manual should have a guide to which is low or high pressure on the gauge.


For your boiler to work properly, it really needs a constant water pressure.


What causes the boiler to lose pressure?

    • A leak can occur anywhere on your central heating circuit, which can make it difficult to identify the source. Be practical when assessing where the leak is coming from, this may involve getting down on your hands and knees and feeling around your radiator valves and pipework, other places to look are your cylinder cupboard and underneath your boiler. Check around pipe joints and connections to see if they’re wet. You’ll be surprised how a relatively small leak can affect the system pressure over a matter of days or weeks. Bare in mind that a small leak could be evaporating away before it can be detected. A leak can also cause water damage to your home. When doing these checks ensure that the central heating has been switched off for at least an hour to ensure the pipework is not hot, you don’t want to burn yourself. You may feel confident in repairing a leak yourself, but if you’d like some help, contact our friendly team on 0114 272 2586.


    • Bleeding radiators can cause a drop in water pressure as you’ve released air from the system.


  • Boilers can simply lose pressure over time.

It’s possible to repressurise the system yourself by topping it up through the filling loop. But if you’re unsure about how to do this, it’s best to give us a call.

  • Low pressure could be a sign that there is something wrong with your boiler and that it needs to be repaired.


Still having trouble?

Don’t attempt to touch any part of your boiler or central heating system if you’re unsure. You should not use a gas appliance if you believe that it may be unsafe. It’s always better to be safe than sorry as you could make things worse. We’re available to advise you on this issue, and there is no problem that’s too small for us to fix.


If the pressure in your boiler keeps dropping, don’t put up with it, contact 1st Call Gas Services and get the problem solved, one of our friendly and knowledgeable Gas Safe registered engineers will be able to help. CONTACT US TODAY