First off, much thanks to all the experts here. It has made a huge difference in setting up my new pool.
Problem: I am unable to prime the pump. It is located on a concrete pad about 40' away from the pool and about 10' above the pool. I open the pump and fill it up with water, close it up, then start the pump. It pulls the water for about 20" then stops. It appears to get an airlock. I just turn off the pump and try again. After many attempts, my brother and I were able to get it primed and it ran about 24 hours without issue. My brother tried to hookup the vacumm and clean the debris off the bottom, but he too lost suction after about 20". I told him to just turn it off and wait til I get back home.
18x36 inground rectangle
aquagenie (no main drain)
500# hayward sand
Hayward Max Flo2 2hp pump
2" lines - 2 of them both go to the aqaugenie - I'm using Sch40 flex pipe with no joints until we start to climb the hill and then we installed a spring loaded check valve and a 1 1/2" bypass valve to make it easy to drain in the winter.
I just don't understand how we are losing suction and what is going on. If anyone can lend a hand, I'd greatly appreciate it.
Much Thanks in advance, Nick