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Screwed up my lawn irrigation, possible solutions?
Posted on 5/28/20 at 10:54 am
Posted on 5/28/20 at 10:54 am
I had an irrigation well pump installed and it runs about 50 psi but has a pressure cut off at 60 psi. I stupidly ran 2 lines with 3/4 pipe and about 30% of the time before my heads are all up the pump hits 60 psi and cuts off. It does this over and over every other second or so, sometimes my heads will start to working other times it continues indefinitely. Once running, it works great. My solution is to open my hose bibb valve and reduce the pressure until the heads are up. Obviously this doesn't work when its set to run automatically.
Basically I think the pressure through the 3/4 pipe is too much until the heads are fully flowing with water. I'm only doing 16-18 gpm so 3/4 should be plenty to support that? If I go over 20 GPM then my pressure drops substantially to where my heads don't work right.
So I need some sort of pressure relief. The obvious answer is install another head closer to the pump. But I don't want to do that on multiple lines that run the same direction really. I'm thinking of putting in a length of 3 or 4" pipe right next to my well to suck up some pressure? My other thought is some sort of pressure relief valve on my hose bibb next to the pump? Any other suggestions to reduce the pressure in my lines temporarily?
Basically I think the pressure through the 3/4 pipe is too much until the heads are fully flowing with water. I'm only doing 16-18 gpm so 3/4 should be plenty to support that? If I go over 20 GPM then my pressure drops substantially to where my heads don't work right.
So I need some sort of pressure relief. The obvious answer is install another head closer to the pump. But I don't want to do that on multiple lines that run the same direction really. I'm thinking of putting in a length of 3 or 4" pipe right next to my well to suck up some pressure? My other thought is some sort of pressure relief valve on my hose bibb next to the pump? Any other suggestions to reduce the pressure in my lines temporarily?
Posted on 5/28/20 at 1:02 pm to baldona
Would not installing a pressure regulator in the lawn irrigation line or at the hose bib not solve the problem? What psi is recommended for for the irrigation the spray heads to effectively operate?
Posted on 5/28/20 at 2:24 pm to CrawDude
quote:
Would not installing a pressure regulator in the lawn irrigation line or at the hose bib not solve the problem?
What does this look like? I haven't looked hard, but a quick search online I couldn't find a pressure relief device for a hose bibb. But that's exactly what I need.
My thought was that I could put a splitter and have the valve on one side always open and then still be able to hook a hose to the other if need be.
Heads are all meant for 30-50 ish psi.
Posted on 5/28/20 at 2:29 pm to CrawDude
ETA: Nevermind, I need the opposite of what is out there. There's regulators that keep the pressure under a certain amount. I need a blowoff if the pressure goes over a certain amount.
This post was edited on 5/28/20 at 2:33 pm
Posted on 5/28/20 at 3:07 pm to baldona
quote:
ETA: Nevermind, I need the opposite of what is out there. There's regulators that keep the pressure under a certain amount. I need a blowoff if the pressure goes over a certain amount.
Understood. See if there might be a lawn irrigation supply company nearby - they should have some type of blowoff regulator that would work for you. Even a plumbing supply vendor should have something once they understand what you are trying to do.
Posted on 5/28/20 at 3:11 pm to baldona
No idea if it would work on lawn irrigation but my tractor sprayer uses one of these to adjust the pressure. You would also need a T on the flow side with a gauge so you can dial it in to the correct pressure.
https://www.tractorsupply.com/tsc/product/hamilton-pressure-regulating-bypass-valve-nylon-3-4-in-mnpt-inlet-x-3-4-in-fnpt?cm_vc=-10005
https://www.tractorsupply.com/tsc/product/hamilton-pressure-regulating-bypass-valve-nylon-3-4-in-mnpt-inlet-x-3-4-in-fnpt?cm_vc=-10005
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