Okay to use a threaded disconnect on pump?

[CarlD]

That union is already coming in handy!

I've always used teflon tape on the threaded connections, but if Pentair says not to, so be it.

Until the warranty expires!

[Ohm_Boy]

I only know of two reasons not to use tef tape... I mean, besides having the manufacturer say not to.

1) Back in the day, we were told to never use it on hydraulic systems, because of the risk of getting a shred of it into the spool valves, and wedging into them. They are a lapped fit, and it doesn't take much to foul them. You have to be REAL careful to always ensure that there is none off the threads, 'specially when there are lots of them to make up. I can't imaging a piece of it causing a real problem with a pool pump and filter, but I AM an idiot, so... you know.

2) Too many layers of tef can over-stress a fitting, and even cause a fracture.

Pipe dope is like Samuel Adams... always a good decision.