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Old 09-02-2012, 08:21 PM
Irrigation Contractor Irrigation Contractor is offline
LawnSite Senior Member
Join Date: Nov 2011
Location: South East
Posts: 373
Originally Posted by BPS## View Post
So one of my apartments (first year contract for me, 15 yr old property) had 135/140 psi at the backflow. Soon as I realized this I immediately put in a request for a pressure regulator. Bid was approved and installed.
Prior to this we'd get leaks and breaks that were pretty obvious it was from high PSI water hammer on the lines.

Now that the regulator has been in I'm changing out A LOT of formerly working heads. 2 cases of RB 5000s and counting, in just one month.
Whats the deal with this? Any body else run into a similar situation?

The best I can come up with as to why they were working and now they aren't is from my help. He wondered if the pressure was so high that it forced a lot of sand/grit past the filters and even tho it was gumming up the works the super high pressure kept the heads working. Now that the pressure is back to more manageable levels the heads just won't work.

What did you set the PSI at with the new regulator(s)? In your case we would use a Wilkins 600 HR rated for 75 - 125 PSI and knock it down to 85 or 90.

We have a maintenance project that is very close to what you have going on. We can run 1 or 2 zones at a time with no trouble, the we need to run 3 - 4 to meet the managers (Multi- Family Community) water window expectations.

We still blow mainlines, but now it is due to try to push more gallons through a mainline never designed to handle that amount. I have been telling then we need another water source, then isolate the entire property into 3 smaller systems. This way we can drop the pressure down into the 80's.

Good luck and I know how frustrating it can be, but the best way to cover yourself is with great communication and data to back it up.
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