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Old 04-15-2012, 09:01 AM   #1
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Sprinkler valves not quite


Recently I have done a coppe repiping and since then I have observed this problem.

When the sprinklers watering is done, the valves are getting closd very hard.. making big noise. I am worried this may damage the valves or the sprinklers.

The connection to these valves is not changed due to coppe repiping. The connection to the sprinkler values is directly from the city water line ,, it means - it is before the pressure regulating valve. The city water pressure is obviously high.

But why this problem now ? Any thoughts ?

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Old 04-15-2012, 10:33 AM   #2
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Sprinkler valves not quite


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......The city water pressure is obviously high......
How High? I would first get one of these:
http://www.amazon.com/Rain-Bird-P2A-...4501168&sr=8-1

This one goes to 200 PSI my old one only went to 100
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Old 04-15-2012, 10:41 AM   #3
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Sprinkler valves not quite


http://www.mrdrip.com/pressureregulators.htm
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Old 04-15-2012, 04:06 PM   #4
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Sprinkler valves not quite


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How High? I would first get one of these:
http://www.amazon.com/Rain-Bird-P2A-...4501168&sr=8-1

This one goes to 200 PSI my old one only went to 100
.
It is 120 PSI. This is directly connected to sprinkler valves. Should I be adding a pressure regulator here ?
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Old 04-15-2012, 09:33 PM   #5
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Sprinkler valves not quite


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It is 120 PSI. This is directly connected to sprinkler valves. Should I be adding a pressure regulator here ?
Your house should be below 80 psi- preferably 60 psi
you probably should lower the sprinkler pressure too. A lot of the piping used for irrigation is not rated for extremely high pressure.
But that may not eliminate the water hammer. Quick closing valves like irrigation solenoid valves attribute to water hammer. Perhaps your water supplier has recently boosted pressure?
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Old 04-15-2012, 10:58 PM   #6
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Sprinkler valves not quite


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Your house should be below 80 psi- preferably 60 psi
you probably should lower the sprinkler pressure too. A lot of the piping used for irrigation is not rated for extremely high pressure.
But that may not eliminate the water hammer. Quick closing valves like irrigation solenoid valves attribute to water hammer. Perhaps your water supplier has recently boosted pressure?
My house is set for 80.

What is the way for me to avoid quick closure of values ?
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Old 04-15-2012, 11:04 PM   #7
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What is the way for me to avoid quick closure of values ?
You can't change the speed of the valves closing but you could install water hammer arrestors. They cushion the effects of water hammer caused by the quick closing valves.
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Old 04-16-2012, 03:31 AM   #8
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Sprinkler valves not quite


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It is 120 PSI. This is directly connected to sprinkler valves. Should I be adding a pressure regulator here ?
Wow,thats a lot of pressure on any kind of valve.
Id have a reducer installed on there,is there a back flow preventer on the system?
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Old 04-16-2012, 04:56 AM   #9
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Sprinkler valves not quite


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.......but you could install water hammer arrestors. .......
They look similar to this:
http://www.amazon.com/Mini-rester-Wa.../dp/B000JRCFHK
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Old 04-16-2012, 05:02 AM   #10
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Sprinkler valves not quite


Definitely put some pressure regulation in place for those irrigation valves.

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