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Old 03-30-2018, 12:14 AM   #1
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Irrigation System High Water Pressure


Hey all. I've been doing some maintenance on the irrigation system at my home. It was installed by the previous owner and a few sprinkler heads and drip irrigation manifolds needed to be replaced.

I discovered that the sprinkler valves (2 zones) are connected to the main line prior to the PRV for the home. The main line splits off in the garage and feeds the fire sprinkler system and the line that goes to the PRV then to the house. Either the builder or the prev owner tied in the sprinkler valves into the non PRV line. The static pressure on the non PRV line is about 130psi

is this normal?... or ok?

I disconnected a drip irrigation manifold and attached a pressure gauge. I engaged the zone and got a reading of 100psi, which should be operating pressure, right?

I believe this is way to high, especially for the drip irrigation. The previous owner seems to have installed a line that feeds both sprinklers and random drip irrigation manifolds (mostly drip irrigation manifolds).

I'm discovering all this now but it seems to have been running ok for the past 6 years I've been living here.

I think I should reduce the pressure.

1. The sprinkler valves are prob receiving nearly 125+ static PSI. Is this safe?

2. What is the best way to reduce the pressure to the entire irrigation system? Just tie in a brass PRV before the valves?
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Old 03-30-2018, 06:53 AM   #2
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Re: Irrigation System High Water Pressure


Yes a PRV is needed IMO, and when installing the PRV, its reads to me as if you need a BFPV on the system also.
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Old 03-30-2018, 05:34 PM   #3
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Re: Irrigation System High Water Pressure


Wow free water awesome!!!!
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Old 03-30-2018, 05:43 PM   #4
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Re: Irrigation System High Water Pressure


Quote:
Originally Posted by Ghostmaker View Post
Wow free water awesome!!!!

Sure sounds like we might be bi-passing the meter. Most homes around here have a meter just inside the home, but I do know of one nearby rural neighborhood that has their meters below ground at the curb.
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