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Leak! I think

Discussion in 'Plumbing and Central Heating' started by chrisneill, 28 Jan 2018.

  1. chrisneill

    chrisneill

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    hope I’m on the right part of the forum. Replaced a rad yesterday. Refit went fine. Problem now though is I am continuously losing pressure as indicated on gauge on pressure vessel. Loss is about 0.1 bar per hour! No obvious leaks. Happening when ch is off or on. Only thing I can think is I have damaged a joint beneath the floor whilst reattaching pipes to new rads??? Cannot get beneath floor without tearing up solid wood floor. Please help!
     
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  3. Gas2Air

    Gas2Air

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    If it wasn't there before, then you have a leak. What sealed system do you have and how did you drain it and refill?
     
  4. lightning

    lightning

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    When heating on does pressure needle go in the red or shows 3 bar, also check prv pipe for signs or dripping
     
  5. chrisneill

    chrisneill

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    Hi. Drained rad through closing lock shield and trv. Then removed, drained and put new one in. When heating on, pressure increases as it always has - apart 0.5b. Re system I have - standard boiler, pressure vessel. All has been fine with stable pressure up until I removed and replaced rad yesterday. No obvious leaks from new rad and with rate of pressure loss, something would be obvious on the floor in my mind. Thinking a bottle of leak seal may be next move??
     
  6. It's an obvious question but how did you bleed the new radiator and re-pressurise the system?
     
  7. Don't!
     
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  9. chrisneill

    chrisneill

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    Once rad was fitted I opened the lock shield, then the trv. Bled the rad. Then bled others that had air in them ( 2 I recall).

    What’s the problem with leak sealer?

    Chris
     

  10. Leak sealer - more likely to clog the system than cure a leak (which it may not do anyway)
     
  11. chrisneill

    chrisneill

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    Sorry meant to say in terms repressuring, added water to vessel to desired pressure.
     
  12. What pressure did you fill to?
     
  13. chrisneill

    chrisneill

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    Same as always. About 1.2 b
     
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