White Expansion Vessels

Discussion in 'Plumbers' Talk' started by screwfox, Mar 27, 2006.

  1. screwfox

    screwfox New Member

    These are for potable water I know, but is there a problem using them on a sealed system?
     
  2. doitall

    doitall New Member

    As in heating system ?

    The red vessel is built in two sections which separate at something like 6 bar can't remember the exact pressure.
     
  3. londonplumber

    londonplumber New Member

    The instructions will tell you what they reccomend for the uses.
     
  4. doitall

    doitall New Member

    The instructions will tell you what they reccomend
    for the uses.


    Don't need to LP they are all the same.

    Red for heating.

    White for hot and cold water Cat 1&2 water.

    Blue for booster pumps.
     
  5. dp

    dp Guest

    In a red vessel, the membrane forms two chambers within the vessel. Water in the vessel is in contact with metal body and membrane.
    Water entering the vessel is likely to be hot and membrane will not fail during 'hot' operation.

    White vessel has a bladder. The expansion is contained within the bladder and at no time will the water contact metal surfaces. My experiance has been that fitting such a vessel to 'hot' side of a boiler will result in bladder failure. Have come across this many times on Ariston Genus boiler.
     

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