Caleffi PRV w/ Bypass

Alan (California Radiant) Forbes

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.

hot_rod

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

https://www.caleffi.com/sites/default/files/file/01085_16_na.pdf
https://www.caleffi.com/sites/default/files/file/01085_16_na.pdf