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Not check valve the siphon break/vacuum relief. That will allow everything after the 4' pipe to drain without siphoning your res.@tobh @Aqua Man Thank you for the suggestions. I figured my foot valve at the start of my suction pipe was a check valve, well it is, but you guys are saying I should add another one at the highest point in my system?
I have a big 260 gallon res that sits 4' tall. From the foot valve a 1" pvc pipe goes up 4', over the top of the res, then back down and connects to the pump on the floor. From there the discharge goes back up about 3', then 90 to your right, travels 4' then pipe goes down about 10' to the floor below.
Anyways, you are suggesting I put the check valve at the highest point of the discharge line, which would be just after the 90. The section of pipe would be the 4' section after the 90 mentioned above.
Not check valve the siphon break/vacuum relief. That will allow everything after the 4' pipe to drain without siphoning your res.
What psi does your system run at?Can you post a picture of what style I am looking for in my application. I searched online but there are a few different designs.
40 psiWhat psi does your system run at?
This ^It sounds like there are no anti-siphon measures in place
So, you suck water out the res with the pump. Then the pump pushes the water up 3 foot, before the drop. It's right here, at the peak of this 3 foot roller-coaster ride, that people are suggesting you let in air.
The suggestion is, you put in a T-piece at this point. Let your water go straight through the T, in a straight line. It is the branch off where we will let air in. All we want, is a check valve that will let air in, but won't let water out.
Your 10 foot drop is what will pull air in through this check valve. So the valve needs to be happy to open, or you will carry on pulling from the res. (edit: some sprung valves may not open under such a light load of 10 foot)
The valve may not fully close sometimes. This is due to salt build-up as it dries off. So it will need a pipe off the other side, back to the tank. This return pipe for any leakage must not be submerged. It must let in air.
Is this making sense?
EDIT: My bad. That 3 foot is lower than the 4 foot res. I would raise it or the head in the res will keep supplying that peak-coaster point with water.
And there you have it. KISS. Keep it simple stupid!!!!!!!!!!This is Uninstalled but you get the idea.
This is my pump and riser that feeds the irrigation system. Just before it takes a 90 and goes into the room I installed a T connected to a check valve which is the grey piece. It's installed backwards and has the spring removed so that it opens very easily. The water pressure holds it closed when the irrigation is on, and when it stops it pulls in air rather than siphoning out of the reservoir.
Forgive the gong show of unnecessary fittings...
View attachment 1185507View attachment 1185506
A picture is worth a thousand words too. This ain't super pretty but it works.And there you have it. KISS. Keep it simple stupid!!!!!!!!!!
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