Our older Sta Rite pump has 2" MPT inlet and outlet ports. Sadly we've sprung leaks at the suction side both the last two years, and now both ports at the threaded male adapter (2" PVC MPT to 1.5" socket adapter). The male adapter then glues to standard 1.5" PVC piping.
Two years ago, we did the repair with some Teflon tape at the MPT end. Reading around, I understand pipe dope works better, so used Rectorseal for the most recent replacement last year. Alas, it appears both pressure and suction side are leaking right at the threads.
I'm gathering supplies for another repair while the pump is down. I know that we've had occasional issues where the pump has run dry due to leaks at the suction side, and a few instances of water level being too low. I suspect these instances have caused the pump to overheat and perhaps deformed the 2" PVC MPT male adapter, as the pump's basket is appearing a bit deformed (presumably from the heat).
For this new repair, would folks recommend replacing the PVC inlet and outlet adapters with a CPVC variety to handle more heat? Certainly the best solution is to keep better watch of water levels to avoid the pump running dry and overheating, but would it be advisable to go with more heat resistant CPVC fittings at the pump?
I see Charlotte Pipe rates PVC at 140F and CPVC Schedule 80 at 200F. These male adapters would be connected to regular PVC pipes and fittings, which I'm not planning on replumbing for the time being, so I don't know how much more resistant the system will be to heat deformity.
I bought the 2" PVC fitting from my local home center for ~$2, but dug around and found a local specialty supplier that carries the CPVC Schedule 80 variety for ~$13.
These are some stock pictures of the adapter fitting, for reference:
Having read up a few older threads/posts about CPVC, it seems there's not much consensus. That, in general, temperatures shouldn't get hot enough to affect the PVC parts and it not being worth the trouble and expense:
--PVC vs. CPVC?
--Is schedule 80 check valve needed?
Two years ago, we did the repair with some Teflon tape at the MPT end. Reading around, I understand pipe dope works better, so used Rectorseal for the most recent replacement last year. Alas, it appears both pressure and suction side are leaking right at the threads.
I'm gathering supplies for another repair while the pump is down. I know that we've had occasional issues where the pump has run dry due to leaks at the suction side, and a few instances of water level being too low. I suspect these instances have caused the pump to overheat and perhaps deformed the 2" PVC MPT male adapter, as the pump's basket is appearing a bit deformed (presumably from the heat).
For this new repair, would folks recommend replacing the PVC inlet and outlet adapters with a CPVC variety to handle more heat? Certainly the best solution is to keep better watch of water levels to avoid the pump running dry and overheating, but would it be advisable to go with more heat resistant CPVC fittings at the pump?
I see Charlotte Pipe rates PVC at 140F and CPVC Schedule 80 at 200F. These male adapters would be connected to regular PVC pipes and fittings, which I'm not planning on replumbing for the time being, so I don't know how much more resistant the system will be to heat deformity.
I bought the 2" PVC fitting from my local home center for ~$2, but dug around and found a local specialty supplier that carries the CPVC Schedule 80 variety for ~$13.
These are some stock pictures of the adapter fitting, for reference:
Having read up a few older threads/posts about CPVC, it seems there's not much consensus. That, in general, temperatures shouldn't get hot enough to affect the PVC parts and it not being worth the trouble and expense:
--PVC vs. CPVC?
--Is schedule 80 check valve needed?
