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Testing new Radiators for leaks prior to Boiler installation.

Discussion in 'Plumbing and Central Heating' started by mick2me, 4 Sep 2018.

  1. mick2me

    mick2me

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    Originally we had a back boiler which has been ripped out and a wood burning stove installed in its place. The system was full of black sludge.

    I have, Replaced all of the radiators with new including TRVs.
    Flushed out the copper pipes of the system prior to the connection of the new rads.

    The new boiler has not yet been fitted as I am not yet decided as to what combi to have installed?

    I now want to fill the system up with mains pressure water to test for leaks.
    If I pressure the system up and there are any leaks the first thing that will escape will be air so I assume soap solution is as good a system as any to test for leaks on joints and rad connections?

    However if water does get into the rads this could cause rust?

    Is it better to fill and bleed the rads, leaving the water in, as once air enters will this not accelerate rusting?

    Any advice on testing rads?
     
  2. ianmcd

    ianmcd

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    if no water in it pressurize the system with an air compressor with a guage and leave to settle for a while and see if you have a drop.
     
  3. MrGassafe

    MrGassafe

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    That is very dangerous advice to be giving anyone! Should not air pressurise a system.
     
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  4. mick2me

    mick2me

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    Thanks, I have no access to such a compressor only one of those 12v car tyre compressors.
    When I attach the hose to the Flow pipe with everything closed water pressure initially caused air pressure in the un-bled system to rise.
    The joints can then be tested with soap solution as you would with gas?

    I guess my question is, If I fill the rads and exclude air will this reduce the risk of them rusting whilst waiting for the system to be completed?
     
  5. dilalio

    dilalio

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    Well, for plastic pipe installation you air test from 1.5x the working pressure, up to 18bar (for older type pipe & fittings) :eek:

    Screenshot_20180905-070415.jpg
     
  6. dilalio

    dilalio

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    FYI... Gas joints are not bubble tested with soap solution they're tested with LDF. Soaps contain oils and other chemicals that could attack various materials in different joints.

    If I were you, I'd fill the whole lot (including rads) with water (bleeding all air out) to about 2.5bar, stick a gauge on it and seal it off and then monitor the gauge over the coming days/weeks/months.
     
  7. Madrab

    Madrab

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    If you're worried about rusting rads then add 100ml of inhibitor to each one before filling.
     
  8. MrGassafe

    MrGassafe

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    More stupid, dangerous misinformation. 18 bar air test! Are you trying to make a bomb?
    That compressor in the illustration is a WATER test compressor.
     
  9. dilalio

    dilalio

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    Good fun when a joint fails though :LOL::p

    Are you also MrFartSafe? :ROFLMAO:
     
  10. muggles

    muggles

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    An Intergas ECO RF is always a great choice ;)

    Soapy water will certainly cause rust - washing up liquid is actually quite corrosive long-term. Why not just fill and test the pipework, and leave the rads empty? Brand new rads are highly unlikely to leak, and in the event that they do they'll be easy to spot and sort out
     
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