I just finished burying 1" poly 100psi pipe to run air from my Gast 0523 in my workshop 500 ft downhill to my 1 acre pond. At the pond, in an irrigation box above flood level, I have a manifold with two ball valves splitting the air for two 5/8" 100 ft weighted airlines to two Vertex XL2 diffusers.
I bought the poly pipe at Lowes @ $28 per 100 ft roll. Ditch Witch rental was $150/day and it took less than a day to trench 12"-18" deep by 500 ft. My wife helped with the uncoiling, connecting, and clamping. My tractor with box blade was very helpful during the recovering. My pond is about 80 miles west of Fort Worth so I am not worried about freezing condensation in pipe buried 12" deep. If I was, I would have found the low spot, dug a dry well and put in a tee and valve for draining.
You don't say where in Oklahoma you are, but you're welcome to come see my installation.
Now if it would just rain! My poor diffusers are sitting in less than 3 ft of water.
