Pipe Threading Lessons

If you need to screw a plastic fitting into an existing metal female adapter you must take great care to prevent cross-threading. Plastic threads are obviously no match for steel or copper threads, and forcing it and cross-threading will only lead to a ruined plastic fitting. Still, you should always have multiple plastic fittings on hand as cross-threading oftentimes is inevitable. Do not over-wrap the threads with Teflon tape. This will make it harder to start and eventually lead to a leak. And do not use a half bottle of pipe dope, then thread tape, then more pipe dope, etc. When