Straight from Rehau website
https://www.rehau.com/downloads/497802/pexaplumbingdesignandinstallationguide-855739uscaen-rehau.pdf
The maximum flow rate of 1” pex is 18.8gpm to stay within Rehau design limits. That’s at 10 feet per second velocity. (Cold water)
Most plumbing codes limit velocity to 8 feet per second for pex. That brings the max GPM to 15gpm. (Cold water)
You’re claiming a 37gpm flow rate at 12’ per second. More than double it’s capacity at the approve flow rates.
Sorry but that’s not going to pass. And even if it does operate, it’ll tear itself up eventually.
https://www.rehau.com/downloads/497802/pexaplumbingdesignandinstallationguide-855739uscaen-rehau.pdf
The maximum flow rate of 1” pex is 18.8gpm to stay within Rehau design limits. That’s at 10 feet per second velocity. (Cold water)
Most plumbing codes limit velocity to 8 feet per second for pex. That brings the max GPM to 15gpm. (Cold water)
You’re claiming a 37gpm flow rate at 12’ per second. More than double it’s capacity at the approve flow rates.
Sorry but that’s not going to pass. And even if it does operate, it’ll tear itself up eventually.
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