How do I re-pressurise the boiler?

If you have no heat or hot water, the most common reason is that the pressure has dropped on the boiler.  For a  central heating system to work properly the water pressure should remain constant. Modern combination boilers are pressurised systems and water will enter the system from the mains cold water supply through a manual filling device, known as a ‘filling loop’. Adding water via the filling loop to the system after a drop of pressure will help bring your system to the correct pressure again and the pressure gauge will then increase.  This should be at 1.5 bar.  Refer to the operating instruction leaflet for the make and model of the boiler for instructions of how to do this.  If you do not have an instruction booklet, these can often be downloaded from the internet.


  • Stuarts Property Services
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    Terry M
    Terry M

    5 out of 5 stars

    posted 4 months ago

    I've rented through Stuart's for 5 1/2 years and Colin and the team have always been friendly and helpful. Any maintenance required was dealt with quickly and efficiently and I was always kept informed if anyone needed access when I was away from the flat.

    I have recently left the flat which has been my home for the past 5 1/2 years and the leaving process was hassle free and simple and my deposit returned without delay.

    Thanks to everyone at Stuarts for making my rental a pleasant and enjoyable one.

    Tony Noble
    Tony Noble

    5 out of 5 stars

    posted 1 month ago

    We have used Stuarts for many years renting out our property in the Heaton's and found them very professional, good at keeping you up to date with progress, and do a thorough job when they find a tenant to make sure they are suitable. Highly recommended.

    Andrew Hayes
    Andrew Hayes

    5 out of 5 stars

    posted 1 month ago

    Up to this date I have always used Stuart’s and I have never been let down. Keep the good work going