Originally Posted by jdlev
it's still leaking from almost every connection. Used a ton of the white teflon tape, and it just leaks...i tightened one damn brass fitting down so much that it stripped the threads!
I've got to head back to lowes tomorrow. Is there any type of lube that might improve my luck with these confounded brass connections?
Contrary to popular belief, Teflon tape or paste is not designed to seal tapered pipe threads. They are lubricants designed to help you overcome the friction which occurs between the male and female threads while tightening. It is the threads themselves which are making the seal.
If you are having problems with stripping threads, you are either cross-threaded, or over tightening. It's net clear in your statement above, is it brass fitting stripping plastic threads, or brass on brass? If you are stripping plastic threads, and you're not cross-threaded, you are over tightening and lubricant will just make it worse. If you are stripping brass threads, well then you really are a man.
The things you need to do are:
1. make sure you have only tapered threads
2. make sure you are applying the teflon properly.
3. do not over tighten. Yes believe it or not tighter isn't always better, as you can strip threads and damage fittings. The ASME actually specifies how many threads are to be exposed on an IPS joint after it is made up, and this is written into state laws and codes in most areas for that exact reason.
4. You could add a thin layer of teflon paste OVER THE TOP of the teflon tape. This is how we thread all of our hydronic fittings in our business, and I haven't had one leak in over 5 years