I fitted some new bath taps yesterday but had hell of a job with a small leak. They look similar to this:
Turned on the water and the cold join leaked a little. Tightened a little more with the spanner, still leaked. Undid both joints and put some PTFE tape around the threads and connected up again. This time the cold joint was fine but the hot one leaked a little. Dismantled and reconnected again with fresh PTFE tape and both leaked a little. Dismantled again and replaced the black rubber washers, one of which looked a bit dented from a bit of over-tightening trying to stop the leak. This time there is a very small leak on the hot side.
Any tips on how to resolve this? Am I doing something wrong? Would some silicone grease on the threads help? Would using two rubber washers instead of one help? I'm wondering if the two pipes coming out of the wall are very slightly misaligned forcing at least one joint slightly out of sealing properly.
It didn't help that the woman I was doing the job for wore only a skimpy semi-transparent nighty and thong all the time I was in her apartment and kept distracting me. What is it with young women nowadays? Are plumbers that popular or was she just too idle to get dressed that day?