Sink drain tail piece threads

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Sink drain tail piece threads

Author: sum (FL)

I am curious, whenever I take apart the tailpiece from the bottom of existing lav drains, I almost never see any pipe dope or teflon tape on them. It is a threaded connection, the threads are fine threads.

Why?

I see some people would even apply dope on compression threads on angle valves when it's not technically necessary.

So why not something to help lubricate/seal the connection of the tailpiece?

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Re: Sink drain tail piece threads
Author: North Carolina Plumber (NC) I always seal the threads, usually with pipe dope.
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Re: Sink drain tail piece threads
Author: m & m (MD) Silicone caulk always works for me.
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Re: Sink drain tail piece threads
Author: hj (AZ) They will ALWAYS leak if some sealant is not used, regardless of whether you see the remnants of it or not.
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Re: Sink drain tail piece threads
Author: vic (CA) I've always used PTFE (aka: "teflon" thread sealing tape on threaded tailpieces.
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