skytower31
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Hi everyone. Just ran across this forum and hopefully someone here can give me a hand.
We have a 4 zone auto sprinkler system at our house. It was installed before we purchased the house. One of the zones is no longer landscaped so I replumbed that valve to another area that had piping pre-run under our concrete walkway for future expansion and landscaping. The piping going in and out of the valve is 3/4" but the pre-run line is 1/2". When I plumbed the line from the valve to the pre-run line I used a reducing 90* elbow to drop from 3/4" line to 1/2" line. When I tested the line, water started gushing up from the dirt below all the valves. After some digging, I found an uncapped pipe that the water was coming from. My guess is that this is some sort of pressure relief pipe. When any of the other 3 zones are on, no water comes from this pipe.
Could I be developing too much pressure with the 90* reducing elbow?
Could I reduce at a straight point in the line and not build so much pressure?
Can I simply cap this open pipe where the water is coming out?
Do I need to re-run that line as 3/4" all the way to the sprinkler risers?
Any thoughts would be greatly appreciated. Thanks!!!
We have a 4 zone auto sprinkler system at our house. It was installed before we purchased the house. One of the zones is no longer landscaped so I replumbed that valve to another area that had piping pre-run under our concrete walkway for future expansion and landscaping. The piping going in and out of the valve is 3/4" but the pre-run line is 1/2". When I plumbed the line from the valve to the pre-run line I used a reducing 90* elbow to drop from 3/4" line to 1/2" line. When I tested the line, water started gushing up from the dirt below all the valves. After some digging, I found an uncapped pipe that the water was coming from. My guess is that this is some sort of pressure relief pipe. When any of the other 3 zones are on, no water comes from this pipe.
Could I be developing too much pressure with the 90* reducing elbow?
Could I reduce at a straight point in the line and not build so much pressure?
Can I simply cap this open pipe where the water is coming out?
Do I need to re-run that line as 3/4" all the way to the sprinkler risers?
Any thoughts would be greatly appreciated. Thanks!!!