SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

You might use a 3/4 x 1 CxMPT adapter, although that might be more expensive.

Yes, there is a tendancy for metal MPT to FPT PVC threded junctions to leak. Biggest culprit is over zealous tightening, causing small cracks in the female PVC fitting. Then, added to the expansion and contraction caused by temperature changes, this is exacerbated and may lead to a leak.

So, I use only MPT PVC to FPT copper or brass.

Boots is a pro's pro. So if he want to reverse the above scenerio, I am confident he can without a leak.

I use 5 turns of teflon tape on every metal to Male PVC threaded adapter.

I like Brass better than copper. I like how heavy it is, and I can use a tool to help me tighten the joint. (Yes, I tend to overtighten a bit, and use a quarter to half turn past maximum hand tightness). Again, I use 5 turns of teflon tape.

I have used copper MPT to a brass FPT faucet or hose bib. I use teflon tape on these.

Hope trhat answers your questions.

And, Boots, I am in Leary Country.

Jeff

If it's a female union end of a manifold fitting, the usual fears of female plastic threads shouldn't apply. It will be the O-ring doing the actual sealing, and not the teflon tape you might apply to the threads.