Irrigation Pipe Question

[MachineMan]

I have burried over 300ft of 2" PVC from my irrigation tank to building pad. It drops about 30+ feet over the entire 300ft. In the middle is a very gradual 2ft bump. Shoud I be concerned about this spot holding an air bubble and restricting my flow? Static line pressure in this spot will probably be <12psi.

Thanks.

[Gary Slusser]

What is the water source and how are you going to move the water; what type of pump etc.?

[MachineMan]

The source is a 2500gal tank that gravity feeds through the 2" pipe down to my building pad. No pump.

[Gary Slusser]

Then if the air isn't pushed through the line to the house, it will be absorbed into the water in a few days/weeks and otherwise won't cause a problem. Air doesn't restrict flow to any extent when the water is running downhill through the air pocket in a pipe. With a full pipe flow, the air will be pushed out the far end of the line.

[MachineMan]

Thanks, that what I needed to hear. I already burried the pipe and don't want to dig it back up. The pipe will be completely full of water at all times.

[Gary Slusser]

Full of water at all times except where the smaller and smaller air bubble is...

[joed]

As long as the air bubble is not higher than the water level in the tank the water pressure will force the air bubble out if the pipe is open at the other end.