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mikemd

New Member

1

Thursday, August 1st 2013, 1:53pm

Maximum length of 1" poly pipe run for zone

I want to make another zone and the run is on the far side of the house down the driveway. I would say it will be 200' before the first head and then approx 150' down the driveway with the rest of the heads. Is there a max length I will be exceeding in doing this due to lose of pressure. The farthest zone I have currently is a run of 150' and then approx 150'

where the heads are. I have good pressure on this zone. I am off a well with a high velocity pump. Thanks

Central Irrigation

Supreme Member

Posts: 364

Location: Central Minnesota

2

Sunday, August 4th 2013, 7:46pm

depends on how much water youre trying to pass through it. Figure out the gpm of the zone and check back when you have that info.

Wet_Boots

Supreme Member

Posts: 4,072

Location: Metro NYC

3

Sunday, August 4th 2013, 10:53pm

What are the flow rates of the existing zones? Once you have that number, you can try it on a pressure loss table. With well water, however, you can lose the ability to undersize a distant zone, because of pump and pressure switch concerns. You would likely pick a pipe size from the pressure loss chart that would lose only a fraction of 1 psi per hundred feet. That would eliminate any worries about the distant zone not having enough pressure, or its not being compatible with the existing pump control settings.

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