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INDIRECT COLD SUPPLY EXPANSION TANK

bruce_21
bruce_21 Member Posts: 241
in THE MAIN WALL
Water meters now have check valves to prevent cross connnections or dirty water going back into the main. There is no place for the water to go when it expands when heated, thus the requirement for little usually 1 gal. expansion tanks. Private well systems don't need the extra tank.

Comments

  • Dave_4
    Dave_4 Member Posts: 1,405
    INDIRECT COLD WATER EXPANSION TANK

    Have seen several installation manuals for indirect water heaters that show an expansion tank on the potable (cold) water supply to the tank. Have never seen such a requirement with gas fired water heaters, whats up.

    Pete
  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    many local...

    codes and Mfg. require one...especially if there is a backflow preventer or a PRV on the main....gas, electric or indirect....kpc

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  • Weezbo
    Weezbo Member Posts: 6,232
    check out Triangle Tube ...they have lowater cutoffs anti scald

    valves and piping arrangements for recirc systems and higher temp domestic Hot water supplies for things like dish washers and clothes washers ...ok?

    shows placement of chunks parts and pieces ...GL with the future installs *~/:)
  • Fern
    Fern Member Posts: 11
    YES COLD WATER EXPANSION

    Yes I have seen it and is a requirement in some cases if you have back flow prevention in place.

    Thanks,
    FERN
  • Rich Kontny_5
    Rich Kontny_5 Member Posts: 116
    Correct!

    Bruce makes a good point and I would like to add another,many homes with wells are now putting iron filters (or curtains) in front of the softener. These iron filters have full size check valves that create a very tight closed potable water system. When water is heated it of course expands, with no where to go it puts undo stress or pressure on water heaters, r/o systems etc.

    With more fiberwound pressure and softener tanks you are looking at potential rupture and smiling attorneys.

    A.O. Smith wants cold water expansion tanks on all tanks to avoid relief valve dripping and related liability.

    Might as well follow the manufacturers recommendations unless you have deep pockets full of cash!

    Make Peace your Passion

    Rich Kontny
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