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    Change a radiator with communal heating


    I want to change my passage radiator, we cut the water supply to the radiators, there was no running hot water and every radiator was off. We isolated the radiator that we wanted to take off.
    I'm on communal heating by the way, as we started to drain the water there was just loads coming out, we stopped at 2 buckets but more wanted to come, is this normal? Or have we done something wrong?

    Asked by Lauren on 6th Feb 2021
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    Best Answer

    EVS Property Maintenance Limited

    "If the valves are turned off on both ends of the radiator it seems odd to get that much water. Of course this depends on radiator spec’s.

    I would say double check the valves each end. If it is a combi boiler have a look at the pressure gauge as the system would have dropped if you was drawing from it.

    Hope this helps!"

    Answered on 8th Feb 2021 - Member since Jan 2021 - report
    Premier plumbing and heating ltd

    "Hi, yes quite normal, it can take up to 30 minutes with a hose if you’re draining it fully. If you turn the heating trv down to zero and the lock shield down to zero. Then have a bucked at one of the valves, open it slightly then open the bleed key. Wait until this stops dripping, remove and replace."

    Answered on 9th Feb 2021 - Member since Oct 2020 - report
    Reach N Shine Window Fascia Gutter Cleaning Handyman Professionals

    "Hi you need to drain the water completely to take off a radiator so there will be lot of water if you are on the bottom are down stairs.
    Fit a hose pipe to drain the water.
    You will need to refill the water after you fit the new radiator there a refill valve at the bottom of the boiler."

    Answered on 9th Feb 2021 - Member since Aug 2016 - report

    "Hi. Please drain all the water out with a hose pipe. Once removed and replaced you will need to refill the water from the refill valve at the bottom of the boiler. Hope that helps."

    Answered on 16th Feb 2021 - Member since Dec 2020 - report
    Joseph Stokes

    "More than likely the radiator valves are not turned off fully and you are draining the whole heating system. The lock shield valve is a form of isolation valve the TRV is not."

    Answered on 8th Feb 2021 - Member since Jan 2021 - report
    pbss ltd

    "Did you turn both valves off either end of rad and if trv fitted you have to take head off and screw on plastic cap to turn off"

    Answered on 8th Feb 2021 - Member since Mar 2019 - report
    Equibuild uk

    "Would be really difficult to say without seeing. Would depend on the radiator size and of the valves are fully closed.

    Isolation the water wouldn’t cause an issue as heating systems are a sealed system.

    I’d advise having a plumbing and heating engineer do the works."

    Answered on 8th Feb 2021 - Member since Oct 2020 - report
    a p h mobile maintenance

    "Do you have a hot water tank and if so you have to stop the water going into the small cold water tank in the roof and you will have a lot of water coming out to and have to drain down all the radiator to and it best to do this.

    Answered on 9th Feb 2021 - Member since Feb 2019 - report

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