How do you seal brass threaded fittings?

To seal brass threaded fittings, you can use either a thread sealant or a Teflon tape. 

1. Thread sealant: A thread sealant is a viscous liquid or paste that is applied to the threads of the fitting before it is tightened. The sealant fills the gaps between the threads, creating a tight seal that prevents leaks. There are many types of thread sealant available, including anaerobic and PTFE-based sealants. Make sure to choose a sealant that is suitable for use with brass fittings.

To use a thread sealant, apply a small amount of the sealant to the male threads of the fitting. Screw the fitting into the female threads of the connection until it is snug, and then tighten it to the appropriate torque specification using a wrench.

2. Teflon tape: Teflon tape, also known as plumber's tape, is a thin, white tape made of PTFE that is wrapped around the male threads of the fitting before it is screwed into the female threads. The tape fills the gaps between the threads, creating a tight seal that prevents leaks.

To use Teflon tape, wrap the tape around the male threads of the fitting in a clockwise direction. Apply enough tape so that the threads are completely covered but not so much that it interferes with the threading. Screw the fitting into the female threads of the connection until it is snug, and then tighten it to the appropriate torque specification using a wrench.

In either case, seal brass threaded fittings, it is important to ensure that the threads of the fitting and the connection are clean and free of debris before applying the sealant or tape. This will ensure a proper seal and prevent leaks.