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My other ride is a C-130J
Join Date: Jul 2004
Location: Southern California
Posts: 3,310
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I am hooked up to city water, pressure from the street is 150 PSI
The inspector wouldn’t sign off on the installation until we put this sign by the PRV
FIRE SPRINKLER PRV
Do Not Adjust
Must Be 100 PSI Min
I did some research and saw this model of sprinkler head is rated at 175 PSI, so I may be OK at 150. It bothers me that this system can’t maintain the set PSI of 85. MAYBE there is air in the line and that might be affecting the pressure.
I opened the main drain again for 45 seconds, let’s see what happens in the next day.
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1975 911 Targa S 3.0 2000 911 Carrera Cab 2005 Cayenne Titanium Metallic
2022 Mercedes-Benz E450 Coupé 2020 Mercedes-Benz E350 2006 ACG Hummer
Previously Owned Art from Stuttgart
2000 Boxster -1983 911 SC Cab -1984 944 N/A
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