Biker1mike wrote:
There is a difference.
White- single density, should only be used on NPT threads up to 3/8 inch in diameter.
Yellow โ double density, often labeled as โgas tapeโ
Red of Pink โ triple density, required on all joints 1/2? or larger.
Green โ oil Free PTFE tape, required for use on all lines carrying oxygen (i.e. โ medical oxygen or welding oxygen lines).
Thanks for that. I've wondered about the difference, but was too lazy to look it up. I just used the white everywhere but gas lines.
I feel like if there's a gasket/o-ring in the union, teflon tape isn't necessary. If it gets past a gasket, it's gonna leak. I had a discussion about this some years ago because my buddy was putting teflon tape on faucet supply lines, the braided, stainless hose style that has a cone-shaped gasket in the connections. He did't see it my way and still, 18 years later, puts tape on those joints. Seems like a waste of time and material. I know it sounds trivial, but when there's a ton of other stuff to be done to finish the job, it's hard to watch a guy wrestle the tape while laying under a sink. Same thing with a slip-fit on the p-trap. If it gets past the gasket, which is a compression-type affair, it's gonna leak. I can see using it with dissimilar metals (galvanic corrosion), but not compression joints in plastic.
'13 F250XL SC gas 4x4 8', Camper & Plow packages, StableLoads, LT285/65R-18 Goodyear Wrangler A/T Adventure, 18x9 Ultra Motorsports "Phantom" wheels
'12 Wolf Creek 850 TC Coleman Polar Cub 9.2k A/C, 90 watt solar, dual propane & batteries, Maggie Rack
