Joint compound AKA dope is used as a lubricant and to seal minor imperfections of the threads
Plumbing pipe threads are squared and conduit pipe threads are tapered.
Pipe dope and/or teflon tape
The threads
Iron Pipe size
Iron Pipe Size
If you are screwing in -- yes -- If not -- you do not use pipe dope
There are two main categories of plumbing pipe: plastic and metal.Not all pipes are as useful or effective as others, and each type is used for a specific purpose in plumbing. PVC pipe is a type of plastic plumbing pipe primarily used to transport high pressured water.
No pipe dope is to be used on the brass seats they will seat dry.
pipe dope and teflon tape
Plumbing pipe threads are squared and conduit pipe threads are tapered.
Yes, it is still a pipe thread. The pipe dope is there to fill in the gaps in the thread. It is impossible to machine the treads close enough in pipe to not need something in the threads to make a seal.
no
Polybutylene pipe is a discontinued pipe.
Pipe dope and/or teflon tape
will carbon steel pipe touching copper pipe cause electrolysis in plumbing situations using water.
A bend in a pipe
NO but you will need some type of sealent OR braze or soldering