Adding Inhibitor to Sealed Central Heating - HELP!!

Discussion in 'Plumbing and Central Heating' started by devellion, 3 Nov 2010.

  1. devellion

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    Huy Guys,

    Heeeeeeelp!!!

    I have one of these;
    [​IMG]

    and one of these;
    [​IMG]

    to dose the sealed central heating unit.

    I have emptied the entire system of water....

    I then attach the bottle to the dosing kit and screw it onto the filling loop. I then open the valve and it will NOT go in. Aaaargh!! I've squeeze the bottle so hard it nearly burst but the liquid will not pass into the boiler?!?!

    What am I doing wrong? I can't see anywhere else in the system where I can add the chemicals. I don't understand why it won't go in. If I fill the system with water it goes in fine. :(
     
  2. seco services

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    you never thought about the check valve in the filling loop

    remove a radiator plug and pour it in if the systems empty.
     
  3. devellion

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    What's the check valve?

    I tried to squirt it in a radiator and it just p!ssed out everywhere but in the hole. Maddening.
     
  4. devellion

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    But if the mains water passed though the valve when open why can't the inhibitor? :S
     
  5. seco services

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    mains is a lot more pressure than you holding a bottle.

    can't see how it pi**ed out when you poured it in a rad.
    check the iso valve is opening and not just the plastic lever turning.
     
  6. devellion

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    Yeah I wondered that. I tried to pour it in the bleed valve but it just poured all over the floor no matter how hard I pushed the nozzle in.

    God this should be so simple. What other options do I have I just can't see where else I can add it? Cut my losses chuck the liquid away and use a concentrate to inject into a rad?
     
  7. seco services

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    i use a funnel on a tube that i've adapted to fit a rad and it never fails to fill.
     
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  8. devellion

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    I opened both bleed valves on one rad and it just came out the other one. With just one bleed valve open it wouldn't go in as there is air inside and just went all over the floor. :(
     
  9. seco services

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    is the rad empty ? :idea:
    are the bottom valves open ? :idea:
     
  10. devellion

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    Maybe I should try and pour it in an upstairs radiator that is more likely to be empty. The valves are open. Thanks for all your help. I've failed at this twice now and had to fill it back up again let alone wasted half the inhibitor.

    I said inhibitor but I'm actually using cleaner as two of our radiators are very noisy in the morning ans wake us up. There is no air so I can only assume its debris the cleaner will remove.
     

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