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Can you use teflon pipe dope on PVC pipe when connecting to cast iron?
If you are screwing in -- yes -- If not -- you do not use pipe dope
Is pipe dope used in joining copper unions?
No pipe dope is to be used on the brass seats they will seat dry.
When joining steel pipe use what?
pipe dope and teflon tape
Do you need pipe dope for brass to brass?
Yes, it is still a pipe thread. The pipe dope is there to fill in the gaps in the thread. It is impossible to machine the treads close enough in pipe to not need something in the threads to make a seal.
Do you use pipe dope on compression ring fittings?
no
How do you fix a leaking tub spout?
If it is leaking when you use the shower, not shutting off completely, it will need to be replaced. If it is leaking at the wall, take it off and reseal the thread on the pipe with either pipe dope or Teflon tape and reinstall.
What is the best thread dressing for galvanized to PVC pipe joints?
Pipe dope and/or teflon tape
Do you need pipe dope to connect brass pipe to copper pipe?
NO but you will need some type of sealent OR braze or soldering
What is the purpose for plumbing pipe dope?
Joint compound AKA dope is used as a lubricant and to seal minor imperfections of the threads
When joining steel pipe what should be applied to the pipe threads before connecting?
when joining to lengths of black steel it is necessary to use either Teflon tape or pipe dope, also called leak lock, this is not to seal the joint per say but the tape and doping act as a lubricant on the threads of the joint allowing for the pipe to be turned together tighter also the dope will dry and become a sealant
What can I do to be safe when I am hooking up a new flex line to an existing gas line which does not have a shut off valve?
Either shut the gas off at the meter or install a valve on the pipe. As long as you don't have an open flame somewhere close to the gas line and have everything ready, you can take the current flex line off and install the valve with little gas excaping. Use pipe dope on the threads of the pipe instead of Teflon tape. This lets you cap the pipe with your thumb while you apply the pipe dope. Then just install the valve and tighten, making sure to hold the pipe so that you don't disturb the next joint further down the line.
How to dope copper to copper connections?
Teflon tape, Hercules Pro dope, pipe joint compound and quick wick , Pipe joint compound without quick quick wick , Blue block ,Teflon paste
