I used a 1 1/4" drive point tied into a 2" galvanized pipe got down to about 18' with 5' of water. The problem is that I always lose the prime, despite having a foot check. The pipe doesn't leak, and the foot check does seat. But if the system stays off for more than an hour or so, I have to re-prime.
I am considering boring 6" abs pipe in order to install a 4" submersible pump.
Any thoughts would be appreciated.
This setup is strictly for irrigation purposes (ours).