Best pipe dope?
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Dj2
In the Trades
Use tape on PVC to brass. No dope.
I just did one today. White teflon only, 7 - 8 times around.
I just did one today. White teflon only, 7 - 8 times around.
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WorthFlorida
Clinical Trail on a Cancer Drug Started 1/31/24. ☹
Use Teflon pipe dope and tape. PVC threaded nipples cannot be cut as well as brass. Two weeks ago I had to replaced the PVC 3/4 inch nipple coming from a water meter with an anti back flow. Tape the PVC and dab some pipe dope on the brass. Do not load it up, no more than a pea size dab.
Craigpump
In the Trades
Blue Monster Tape with a bit of Blue Monster dope
Michael Young
In the Trades
BLUE MONSTER!!
In my opinion, Blue Monster Teflon Tape and Pipe Dope are my #1 choice. They make a great product
http://bluemonsterproducts.com/ptfe-thread-sealants_ptfe-thread-tapes.shtml has good info. Their Blue Monster PTFE Thread Seal Tape has a density of 0.80, which is denser than your standard cheap white stuff. Their yellow gas tape has a density of 1.50, which is a further step up.
Oatey Pink has a density of 1.35 to 1.50.
https://www.globalspec.com/learnmor..._fabricated_materials_components/thread_tapes has some discussions of PTFE tape.
I have run across a Monster lie: "Composition 99.6% PTFE < 0.4% Pigment" followed by "Density 0.8g/cm3". (https://www.supplyhouse.com/Blue-Monster-70885-TFE-Blue-Monster-1-2-PTFE-Thread-Seal-Tape)
The density of PTFE is 2.2 gm/cm3. (https://en.wikipedia.org/wiki/Polytetrafluoroethylene). Therefore something with less than 1.0 density would be less than 50% ptfe.
Water has a density of 1 gm/cm3.
The only thing I can add is that cheap Teflon tape is garbage. If your tape acts more like Saran Wrap when you try to use it, throw it out. Get a name brand high density Teflon tape. I use and like Oatey grey tape.
John
John
Chucky_ott
Active Member
Hmmm. Styrofoam likely has a lower density than the base material used to fabricate it.
Could PTFE tape be made with voids, which would reduce the density but still be close to 100% PTFE? I doubt anyone includes air as an ingredient. The pigment might be included though.
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You are probably right.
I think that is probably what they are going with. I expect the CEO is a marketing guy.
Oatey pink tape sank when I tried it (after I got the air bubbles off).
Fitter30
Well-Known Member
Any brand of anaerobic dope
Chucky_ott
Active Member
I was on Wikipedia a few minutes ago. One of the featured articles was on the inventor of Goretex. This led me to this article: https://en.m.wikipedia.org/wiki/W._L._Gore_and_Associates
Note this excerpt which says "This resulted in the transformation of the solid PTFE into a microporous structure that was about 70% air. "
Although the article is for Goretex, I'm assuming PTFE tape could have the same type of structure.
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