Replacing Ball Valve in Hot Water Header Tank

Discussion in 'Plumbing and Central Heating' started by griffog, 9 Sep 2011.

  1. griffog

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    Ball valve is dripping and a replacement washer didn't cure the issue so time to change.

    It's a 1/2" Type2 but how do I know if it's high or low pressure? I ask after the fact as I took the old one off, went to B&Q and bought what looks like an identical replacement.

    It's all fitted and appears to work fine but only after installation did I see mention of high/low pressure. The one I've fitted is low pressure.

    Will this be OK? It fills fine and shuts off OK or do I need to go and get a high pressure version.
     
  2. Diyisfun

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    High pressure if connected to the mains.
    Low pressure if feed from a tank.
     
  3. griffog

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    Thanks, I'm pretty sure this is fed from the mains. So does that mean I need to go and get the high pressure version? It all seems to work fine and I can't see any difference in the valves between the old and the new.
     
  4. HERTSDRAINAGE2010

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  5. griffog

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    Thanks, but I'm curious as to what the difference is and if I'm safe to leave the new low pressure valve that I've just fitted in place? It's identical to that screwfix item apart from being a low pressure version.
     
  6. HERTSDRAINAGE2010

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  7. griffog

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    Thanks Andy, I'll disassemble the old one and see if I can swap that part
     
  8. HERTSDRAINAGE2010

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    In the picture above you will see '3 x high pressure white seats, 3 x low pressure red seats'

    That is the part that is different.

    Andy
     
  9. griffog

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    Thanks for your help Andy, stripped old one which had a green restrictor in with a larger hole. Have now swapped that into new ball valve and all seems OK.
     

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