Lifespeed
Member
I just replaced my Zurn-Wilkins 1-NR3XLDU 1" Pressure Reducing Valve as it was 12 years old and I wasn't happy with the pressure regulation. It would drop by as much as 10 psi from a 50psi set point depending on water flow. We're talking 2-1/2GPM from one shower, or 5GPM from two. This didn't really seem reasonable. Also, it would occasionally stick at higher pressure, so decided it was time to replace.
I put in a new regulator, and while this one doesn't stick at the higher municipal water supply pressure (could be higher than 70psi), it still drops considerable pressure at what seems like very reasonable flow rates.
The plumbing is a 3/4" municipal meter 20' from the house with a 1" main to the house, through a 7000SXT carbon filter, softener, and then 1" trunk all the way to the tankless water heater. Then 1" out of the tankless, branching off using 3/4" only necking down to 1/2" at the shower valves, or in the wall for small faucets, etc. The type L copper is 8 years old. The pressure drops regardless of whether the draw is inside the house (through the softener) or hose bibs (before the softener), causing me to suspect the regulator. At flows of 5GPM or greater it will drop from 50 psi down to 38-40psi. This doesn't seem reasonable to me, shouldn't the regulator maintain the set psi under benign conditions like 5GPM through a 1" pipe?
I put in a new regulator, and while this one doesn't stick at the higher municipal water supply pressure (could be higher than 70psi), it still drops considerable pressure at what seems like very reasonable flow rates.
The plumbing is a 3/4" municipal meter 20' from the house with a 1" main to the house, through a 7000SXT carbon filter, softener, and then 1" trunk all the way to the tankless water heater. Then 1" out of the tankless, branching off using 3/4" only necking down to 1/2" at the shower valves, or in the wall for small faucets, etc. The type L copper is 8 years old. The pressure drops regardless of whether the draw is inside the house (through the softener) or hose bibs (before the softener), causing me to suspect the regulator. At flows of 5GPM or greater it will drop from 50 psi down to 38-40psi. This doesn't seem reasonable to me, shouldn't the regulator maintain the set psi under benign conditions like 5GPM through a 1" pipe?
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