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Parks539

New Member

Posts: 3

Location: Texas

1

Monday, May 7th 2012, 4:34pm

pressure regulator

My static pressure is 78 psi and Im going to be using Rainbird 5004's with the internal pressure regulator. Do I need to use a pressure regulator for the entire system? And if a regulator is used does that have an effect on the GPM?

Wet_Boots

Supreme Member

Posts: 4,020

Location: Metro NYC

2

Monday, May 7th 2012, 5:16pm

I would think twice about using those heads - 78 psi static is on the weak side, all told, unless this is a curbside meter feeding a small lawn.

Parks539

New Member

Posts: 3

Location: Texas

3

Monday, May 7th 2012, 5:50pm

Now I'm really confused, everything I've read says around 60 psi is ideal???

Wet_Boots

Supreme Member

Posts: 4,020

Location: Metro NYC

4

Monday, May 7th 2012, 5:55pm

Static pressure is not operating pressure. Including pipe and fittings and valves and backflow preventer, you could lose 20 psi, and that's before you turn on a zone.

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