Yes, otherwise you will have leaks
yes,as you do in case of joints in ro plants.
Yes
Lead wipe a brass nipple into the lead pipe and then use a female adapter x PVC on the brass threads
Since water can leak through the smallest cracks and holes, applying a clockwise layer or two of teflon tape to the threads of a plumbing connection can help prevent water leakage.
No, do not use glue. Use teflon tape or pipe dope on the threads. You should also make sure you always put the male PVC thread into the female metal thread. If you do it the other way you will tend to split the PVC fitting when you tighten the threads.
To connect PVC to galvanized pipe, you can use a PVC to threaded adapter. This adapter has a female threaded end that can be screwed onto the male threaded end of the galvanized pipe. Make sure to use Teflon tape on the threads to create a tight seal and prevent leaks.
No. Use teflon tape instead. PVC will melt or burn depending on the temperature
Teflon tape is a colloquial name to a form of tape that is regularly used in plumbing. Its most frequent use is to seal the threads on lengths of pipework.
Yes, otherwise you will have leaks
yes,as you do in case of joints in ro plants.
If you are screwing in -- yes -- If not -- you do not use pipe dope
Use teflon tape with a little pipe dope. If you don't ever have to take apart again then you can use glue which you are calling cement
To properly use Teflon tape for sealing pipe threads, wrap the tape around the male threads in a clockwise direction. Make sure to overlap the tape by about half its width and wrap it tightly. This will help create a tight seal and prevent leaks when connecting the pipes.
Examples are: polythene, Teflon, polycarbonate, polystyrene, polysulfide, PVC etc.
Yes
Lead wipe a brass nipple into the lead pipe and then use a female adapter x PVC on the brass threads