When Use Standpipe Pressure Reducing Valves?

11/29/2019

On a combination Class I standpipe/sprinkler riser with automatic standpipes, what is your process to determine exactly where pressure reducing valves should be used?

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4 Comments

Arthur J Tiroly

11/29/2019 02:14:05 pm

When fire pump churn pressure exceeds 175 psi on all sprinkler zones.

Fire department should determine pressure limit at pump churn pressure on fire department hose valves at all levels.

Vinnie

12/2/2019 06:12:04 am

I have used a nodepoint at every control valve in the standpipe, and whichever is above 175 psi gets a PRV

Vinnie

12/2/2019 06:13:55 am

at pump churn

Max

1/6/2020 07:04:49 am

I would say when working pressure of the system exceeds 175 psi. Working pressure is static pressure + pump churn pressure. The pressure normally felt by the system.

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