Thank you for the information!
I understand about the pressure tank maybe being bad, that makes sense. When it cycles 3 times to fill a toilet, it runs 2 or 3 seconds each time and has things back up to 60psi. I thought that was okay since it builds up pressure so quickly. I do understand that short cycling will kill it. Do you think my pump is too small for the well depth? You said it barely makes enough pressure to work with 40/60, so that concerns me. I might have something incorrect in the system.
I was considering the CSV125 to thread into the bottom of the pitless adapter, but had another thought. Is there any reson i couldn't thread a pipe nipple into the pump outlet and put the csv125 there, then a hose barb to poly pipe? In my mind, that would keep the back pressure off the poly pipe and keep it in the pump housing. Or is that a bad idea?
I will consider all options and suggestions. Sometimes what we think we know about things isnt correct, and I am willing to relearn anything that I may have misunderstood for years. I will surely replace the pressure tank at this point. Just wondering if I did okay on pump choice and my thought process. If something I mentioned could be done better, I am all ears.