esshup,
I also forgot to ask about failures in the polypipe systems you have installed or worked on.
For pipe rated much higher than the system operating pressure, have you observed any pipe failures due to the materials? Or do you see damage only from rodents chewing, humans digging/plowing, etc.?
We just use the low pressure stuff. It's rated way over what pressure the aeration compressors are putting out, which is typically 5-10 psi.
The only failure that I've seen is in 3/8" poly that was chewed by what I think was a mole. I have had poly pipe come apart at the junctions where it was put together with a barbed fitting, but only in a watering system where psi was 30-60 with no hose clamp on the connection. Never had a failure of 1" poly in an aeration system (yet).
