- Designed for secure leak-resistant connections
Adapters for semi-rigid tubing are color-coded by tubing size for easy identification. A two-piece nut and ferrule system provides a liquid tight connection and withstands pressures up to 500 psi. Adapters come with polypropylene (PP) 1/4" NPT(M) thread fitting; wrap NPT thread 3 to 4 times with PTFE tape and wrench tighten for a leak-resistant connections.