BX2200 block heater install

[JWE]

This comment fits in the "for what it's worth" category.

When I talked to the Loctite Engineer he said not to use teflon tape. He said that Teflon tape is not a sealant, it is a lubricant. It seals leaks by allowing you to over tighten the fixture; frequently to the point of deforming the threads. He said that most people over tighten when using teflon tape.

Before I talked to Loctite I tried Teflon tape and it did not work. I also tried a couple different pipe compounds that I purchased at Home Depot without success. I was desperate when I called Loctite.

John

 

[Junkman]

This is a point that I have stressed many time on TBN, however, it is hard to teach a old dog new tricks. Teflon tape was originally designed to be used with old pipe threads that had been disassembled many times and to take up the gaps. Today it is used all too often on new pipe threads that just cut the tape and many times just doesn't work for the purpose that the installer intended. Ask any professional plumber that has been around a while and I am certain that they will know of horror stories of what happens when you over tighten with Teflon tape. Pipe threads are tapered and if you over tighten them, they can and do crack the item that the pipe is being inserted into. Pipe compound with Teflon on the other hand doesn't have the same effect. When working with pipe threads, you have to develop a feel for how tight it is or you can be in trouble..

 

[Ken_CT]

I am not a big fan of teflon tape alone, but it has its place. Some people put tape on the thread & then brush dope over it. Different strokes for different folks. If you are using tape, it should be noted that the first couple of threads should be exposed. If the teflon tape extends too far past the thread it will probably be sheared off while tightening. These small pieces of tape can work there way down the line and cause problems, especially in gas appliances and air tools. Often if the casting cracks and leaks from overtightening, tightening it futhur only opens up the crack more, so it leaks worse. If the threads are cut too deep you can wrap the threads with wicking, then apply sealant. That's the old school way, and it works very well. Before beginning assembly one should make sure both surfaces are relativly clean, rust free, and free from oil. choosing the proper size & type of wrenches is important for tightening properly. How tight is tight? You learn the feel with practice. ....In future classes we will go over pouring lead & oakum joints /forums/images/graemlins/grin.gif