John Guest® Speedfit® pipe and fittings make plumbing easy and quick. Can be installed in three quick steps. 1 - Cut and clean burrs on pipe. 2 - Insert pipe into fitting. 3 - Tighten collar and turn on water. It's that simple! Fittings can be used with PEX copper, PVC, CPVC or other CTS size pipes. Provides a simple method of breaking into branching off a rigid run without altering existing pipe work. Tee Installation Kits do not have IAPMO or ICC approval. Not for burial.