- Joined
- Sep 21, 2018
- Messages
- 2,769
the diaphragm (6) is usually the first thing to fail ...5 and 9 ..are valve assembly one is for a bypass pump no pressure switch (9) ....and one is for a pressure switch pump (5) ...I believe there are also two drive head styles (10) ...one with threads and one without...not 100 percent sure on that...So, is it #5 or #9 or both that eventually fails?