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What are these?

What are the two valves to the left of my sight glass?

Opening the top one while steaming emits dry hot steam.

Opening the bottom doesn't seem to do anything. I'm guessing it's clogged.

I was assuming they are valves ported right out of the tank, one above the water line, one below it. Is this a correct assumption? Whats the importance of blowing down that lower valve? Do I need to try and clean it out?


  • Hap_Hazzard
    Hap_Hazzard Member Posts: 2,846
    edited October 2013

    Those are try-cocks. They're an alternative to a glass gauge. The water is at the correct level when water comes out of the lower valve but not the top valve when you try them.

    If the bottom one's clogged you can clean it out, but if the gauge is working, it's not urgent. As long as they're not leaking you're good.
    Just another DIYer | King of Prussia, PA
    1983(?) Peerless G-561-W-S | 3" drop header, CG400-1090, VXT-24
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