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If it's got a rubber washer, then the washer does the sealing, not the threads. Same with connections on the toilet or sink. If it has a rubber O-ring or a brass compression fitting, it's not supposed to have thread sealant because those threads were never designed to seal anything.It would be like putting pipe dope on a garden hose fitting.The PCV fittings need a sealant that is made for that type of plastic. I don't think Teflon paste is. Be sure to check that out.
If it's got a rubber washer, then the washer does the sealing, not the threads. Same with connections on the toilet or sink. If it has a rubber O-ring or a brass compression fitting, it's not supposed to have thread sealant because those threads were never designed to seal anything.
It would be like putting pipe dope on a garden hose fitting.
The PCV fittings need a sealant that is made for that type of plastic. I don't think Teflon paste is. Be sure to check that out.
