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  • Easiest way to add inhibitor to CH
  • airvent
    Free Member

    To add inhibitor to our central heating system can I just pour this straight into the loft tank or will this just sit in the tank rather than being circulated?

    Flaperon
    Full Member

    I wouldn’t. You can get inhibitor in pressurised cans that will fire straight into a towel rail or radiator.

    footflaps
    Full Member

    Easiest way is pour it in the header tank and then just drain a few litres out of the system somewhere to draw in the inhibitor in the header tank.

    Or if you have a magnetic filter you can close that off, drain it and then fill with inhibitor – that’s how I do it now (used to just pour in the header tank).

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    ads678
    Full Member

    I had some work done recently and then needed to drain the system and re fill it after a week or so to remove the cleaning stuff or something, my heating guy just told me to open the bathroom towel rail and poor the inhibitor in there before refilling the system.

    footflaps
    Full Member

    my heating guy just told me to open the bathroom towel rail and poor the inhibitor in there before refilling the system.

    Easy if the system has been drained first, not so easy if it’s full…..

    airvent
    Free Member

    In via the heated towel rail makes sense, presumably could just open the top and siphon off a litre of liquid then replace it with inhibitor. Thanks all

    footflaps
    Full Member

    In via the heated towel rail makes sense, presumably could just open the top and siphon off a litre of liquid then replace it with inhibitor. Thanks all

    Do remember to isolate it first! Otherwise you’ll just be draining the mains via the header tank….

    Flaperon
    Full Member

    https://fernox.com/product/protector-f1-express-400ml/

    Idiot-proof, even for my plumbing capabilities.

    airvent
    Free Member

    Do remember to isolate it first! Otherwise you’ll just be draining the mains via the header tank….

    I swear I’d have remembered if I’d not been reminded to… honest!

    andylc
    Free Member

    Bathroom towel rail is super easy if you’ve got one with a valve at the very top.
    1) Turn the thermostatic valves off. Bleed radiator using top valve
    2) Loosen a bottom nut and drain out the approximate amount you want to put in. Tighten it again.
    3) Close bleed valve and then remove it completely using aforementioned adjustable spanner.
    4) Add inhibitor via the top valve. If you get it right you’ll fill it back up again completely. Replace bleed valve. Done!

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