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Caleffi PRV w/ Bypass

Alan (California Radiant) Forbes
Alan (California Radiant) Forbes Member Posts: 4,076
edited October 2022 in THE MAIN WALL
On my wish list to be able to buy off the shelf: A pressure reducing valve with a bypass that has unions so that you can orient the configuration.

8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

Two btu per sq ft for degree difference for a slab


  • hot_rod
    hot_rod Member Posts: 22,353
    The 5350 is a 3/4" fill valve, it flows around 8 gpm, up to 20 gpm if you don't mind the high velocity in your piping for the time period :) No levers, to move it is a fast fill valve by design.
    So no need to pipe a bypass.

    10 gpm is about all you get out of a 1/2 hp fill cart or pump.

    Sweat, press, pex, npt connection options. Cartridge removal and replacement, or cleaning with a basic channelocks.

    Its available as a body only and you could put a variety of 1/2" tailpieces on it.

    Its generally sold on larger, commercial boiler installs, they are more likely to have 3/4 fill line.

    The 535H is available as a 1/2" prv for domestic applications, but only goes down to 15 psi. We could load a lower pressure range cartridge in it, that is all we do with the 5350, it is a standard house prv with a lower cartridge pressure range. I'll run it by the product manager

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    mattmia2Alan (California Radiant) Forbes