Also known generically as PTFE tape, it’s generally used as a sealant and lubricating material, perfect for installing fittings in the kitchen and bathroom. In fact, it’s essential to use thread tape for those household brass fittings unless a rubber seal or gasket is in place.

Is Teflon tape always necessary?

Seal plastic fittings by wrapping the thread with Teflon tape. Go around the fitting two or three times, then pull the tape tight to break it off. … If a straight threaded connection has a rubber gasket, there’s no need to apply pipe sealant or Teflon tape.

Do I need plumbers tape for water supply lines?

Most faucets will have hot and cold water supply lines attached, so you just need to connect them to the appropriate water supply line. You may need to use Teflon tape (aka plumber’s tape) for this part, which is used to seal and lubricate threaded pipe joints.