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Thread: Supply to Boiler and pressure reducing valve question

  1. #1
    DIY Member philtrap's Avatar
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    Default Supply to Boiler and pressure reducing valve question

    Referencing the attached photo from the Installation Manual for the TT 100 solo, I have a question about the pressure reducing valve. It shows (unless I'm reading it wrong) the pressure relief valve looped around a ball valve. When the ball valve is closed, the water would be supplied at a reduced pressure by the reducing valve which is OK. My question is since I've never seen an installation like this:

    1) Is the reason for the ball valve so that you can fill up the system quickly without going through the reducing valve?

    2) Is the ball valve necessary?

    Thanks,


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  2. #2
    In the Trades Tom Sawyer's Avatar
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    You don't need the bypass valve. The prv has a quick fill feature built in.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Default valve

    1. YEs. 2. Only if you want to be able to fill and flush rapidly. 3. I usually pipe the bypass around the reducing valve, but that is just a personal preference and has nothing to do with how it works. 4. Not all fill valves have the internal bypass/quick fill feature
    Licensed residential and commercial plumber

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    DIY Member philtrap's Avatar
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    Thanks guys!!!

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