The Plumber's Choice 1/2 in. x 520 in. PTFE Thread Seal Tape for Plumbers in White (Pack of 5-Rolls) 125205 - The Home Depot
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How to Use PTFE tape (Teflon tape) on threads « Plumbing & Electric :: WonderHowTo
Amazon.com: Teflon Tape, Thread Seal Tapes, PTFE Thread Seal Tape for Plumbers Sealant Tape for Leak Water Pipe Thread 3/4 inch x 790inch (2 Pack/White) : Industrial & Scientific