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King valve & return valve on residential boiler

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Scott216
Scott216 Member Posts: 13
In the Near-Boiler Piping in Steam Heating Systems video Dan Holohan recommends having a king valve and return valve so you can isolate the boiler from the system Then turn it on and build up pressure and open the mud valve to clean out the system. Is this something I should do for my residential boiler? Or is this something you typically just do with commercial boilers? I have Peerless Model 63-04.

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  • 109A_5
    109A_5 Member Posts: 1,388
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    Hello @Scott216,

    I am not convinced that is the only way, and those large valves can be expensive. The wet return needs to be kept clear too.

    @ethicalpaul, may have an opinion.

    Steam boiler piping: is the manufacturer spec good enough?
    https://youtu.be/4IymyZB4wlI

    Also this Youtuber has a lot of videos with clean out valves and water feed locations.
    Just one, see 4:00 and on if you do no want to watch the whole thing.
    Weil-McLain SGO-3 Steam Boiler Install - Still No Friggin' Burner Door OR Trim Kit.
    https://youtu.be/2TdUtYhptqc




    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,764
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    @Scott216

    The valves are nice, but most don't put them on a residential boiler. You will find anything in 3" very $$$$
  • Scott216
    Scott216 Member Posts: 13
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    @Scott216

    The valves are nice, but most don't put them on a residential boiler. You will find anything in 3" very $$$$

    I could use two 2" valves on the two risers, and one 1-1/4" valve on the wet return. I already have a 1-1/4" valve laying around. 2" brass ball valves are about $55 each.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,764
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    @Scott216

    That will work
  • gerry gill
    gerry gill Member Posts: 3,078
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    Make sure the valves on the steam pipes are rated for steam.
    gwgillplumbingandheating.com
    Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.