Pump Replacement, Should I Use Teflon?

[vadoctor]

I am replacing a sundance spa 2 speed pump and was wondering if i should use teflon paste on the wet end of the pump ( male threads ) when i am tightening the pvc nut. i can't find it mentioned anywhere but it seems that it would lessen the chance of a leak. or is this a bad idea?

[SpaSage]

You shouldn't need to use teflon on the 2" connections on the wet end of the pump. You do want to use a bit of teflon on the nut(s) or bleeder connections. These will be much smaller, 1/4"-ish.

[Roger]

I like to use Majilube on all threads. Teflon take on some along with lube.

[dg98adams]

I believe the ring should be clean and dry.

[PreservedSwine]

O-rings can be lubed, but gaskets should be clean and dry- it depends on what yours has. Also, no need to use teflon or lube on the pump union threads- it's a compression fitting, the threads are meant to tighten the O-ring- the threads are NOT waterproof, nor are they meant to be- that's the job of the O-ring or gasket.