threading compound
- Thread starter NYSail
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If it's for..
If it's for the thru-hull to the valve joint wrap it with teflon tape then use a good pipe dope on top of the teflon tape. No leaks! This is an old plumbers trick for working around boilers where lots of expansion and contraction occur in the black iron pipes. Threaded joints (ones that get screwed together, not soldered) need some help to make sure they don't leak. Pipe dope, also known as joint compound (although not the same joint compound you apply to drywall!), will do the trick if you apply it to the threads before you screw the pieces together. Teflon tape does the same job with a bit less mess — wrap it tightly around the threads before you join the pieces. The best bet though for joints under the water is to use both tape and pipe dope. Over kill yes inappropriate no. This is a very cheap and nice way to do it ensuring absolutely NO leaks. One Roll of teflon tape $0.46 cents one can of Pro-Dope that will last you a life time $3.15. Enough said.. Do NOT use plumbers putty! Plumbers putty is for seating sink drains and not for threaded NPS fittings. I really like Hercules Pro-Dope here: http://www.pexsupply.com/product_dtl.asp?pID=4103&brand=Hercules&cID=434
If it's for the thru-hull to the valve joint wrap it with teflon tape then use a good pipe dope on top of the teflon tape. No leaks! This is an old plumbers trick for working around boilers where lots of expansion and contraction occur in the black iron pipes. Threaded joints (ones that get screwed together, not soldered) need some help to make sure they don't leak. Pipe dope, also known as joint compound (although not the same joint compound you apply to drywall!), will do the trick if you apply it to the threads before you screw the pieces together. Teflon tape does the same job with a bit less mess — wrap it tightly around the threads before you join the pieces. The best bet though for joints under the water is to use both tape and pipe dope. Over kill yes inappropriate no. This is a very cheap and nice way to do it ensuring absolutely NO leaks. One Roll of teflon tape $0.46 cents one can of Pro-Dope that will last you a life time $3.15. Enough said.. Do NOT use plumbers putty! Plumbers putty is for seating sink drains and not for threaded NPS fittings. I really like Hercules Pro-Dope here: http://www.pexsupply.com/product_dtl.asp?pID=4103&brand=Hercules&cID=434
There are many grades and brands of pipe
joint compound For use in water any of them are adequate. Maine sail has given good advise. A plumber once told me that with black iron pipe it would stop leaking on its own after a while, a little rust and all, but if you ever want to take it apart later then be sure to dope the threads. I have taken forty year old pipe joints apart and the threads were still bright.
joint compound For use in water any of them are adequate. Maine sail has given good advise. A plumber once told me that with black iron pipe it would stop leaking on its own after a while, a little rust and all, but if you ever want to take it apart later then be sure to dope the threads. I have taken forty year old pipe joints apart and the threads were still bright.
GOOD ADVICE
GOOD ADVICE GIVEN. I LIKE MAINE SAILS SUGGESTION OF USING BOTH TEFLON TAPE AND PIPE DOPE. OVERKILL?? HARDLY. IT YOU EVER NEED TO TAKE THAT SUCKER APART YOU WILL BE GLAD YOU OVERKILLED IT. I WOULD SUGGEST USING THE YELLOW TEFLON TAPE. IT IS A LITTLE THICKER THAN THE WHITE, AND FOR ME IS A LITTLE BIT EASIER TO APPLY. COSTS AT LEAST A DIME MORE THAN THE WHITE STUFF. DO NOT USE PLUMBERS PUTTY. IN THIS APPLICATION IT WILL DO YOU ABSOLUTELY NO GOOD.
GOOD ADVICE GIVEN. I LIKE MAINE SAILS SUGGESTION OF USING BOTH TEFLON TAPE AND PIPE DOPE. OVERKILL?? HARDLY. IT YOU EVER NEED TO TAKE THAT SUCKER APART YOU WILL BE GLAD YOU OVERKILLED IT. I WOULD SUGGEST USING THE YELLOW TEFLON TAPE. IT IS A LITTLE THICKER THAN THE WHITE, AND FOR ME IS A LITTLE BIT EASIER TO APPLY. COSTS AT LEAST A DIME MORE THAN THE WHITE STUFF. DO NOT USE PLUMBERS PUTTY. IN THIS APPLICATION IT WILL DO YOU ABSOLUTELY NO GOOD.
Great point Nice & Easy
All I use is the yellow "gas grade" teflon tape it's a much better product but wrap it tightly! The price difference between the yellow & white teflon is a couple of Ford gum balls.....
All I use is the yellow "gas grade" teflon tape it's a much better product but wrap it tightly! The price difference between the yellow & white teflon is a couple of Ford gum balls.....
I use a teflon filled pipe dope for most work
and Permatex gas and oil pipe compound for diesel fittings. Rector seal comes in a couple of grades and the label always defines the limits of serviceability. Most of them can be cleaned up with alcohol while still fresh.
and Permatex gas and oil pipe compound for diesel fittings. Rector seal comes in a couple of grades and the label always defines the limits of serviceability. Most of them can be cleaned up with alcohol while still fresh.
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