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can ABS touch concrete?

Two questions 1. The inspector said to never to use teflon tape on gas pipe. Use dope. He stated never to use teflon tape on pipe threads True? 2. Gas pipe under a raised floor: Galvanzed or black iron?

I have two clean out thread caps leaking when I test the drain system by filling it up at the top of the vent. I have tried Teflon tape then teflon tape with thread seal for ABS pipe. The leak is a drop per hour or less. This will be inspected. I dont know how critical it is What other...

Is installing about 20 feet of black iron pipe for a liquid propane gas range too much for a homeownwer to do? I'm adding on a 480 sq foot kitchen. So far I have done it all. Grading, foundation, framing, roof, shearwall, siding, electrical, drain, copper tubing (hot and cold) Should I...

I have new 3/4 tubing suspended under a raised floor using metal plumbers tape. There is plenty of room to work under the floor. In some areas I can anchor the tubing directly against the bottom of the floor joist. Other tubing needs to have a gap between the floor joists. What are the...

The tubing is routed under a raised floor. I have it suspended using metal tape. I would like to know what is the best method for securing the tubing to the bottom of the floor joist.

I am a newbie and have been fitting the copper tubes with elbows and t's by using the emory cloth method. I clean up with wirebrush bristle to polish, smooth. The problem is it takes too long to fit the joints together. In some cases if too tight the fitting never comes apart. I think...

I'm installing a loop vent for an island sink. This is for a room addition. I would like to make the loop vent waste connection up stream of the sink waste connection. The two books I have show the vent return to the waste line down stream from where the sink connects to the waste line. Does...