Riser-flex swing pipe is compatible with Funny Pipe fittings from Toro, as well as 1/2-in. swing pipe fittings from Rain Bird and Hunter. The pipe is constructed from low-density polyethylene (LDPE). The texture on the pipe makes it easy to grip as you thread spiral barb swing pipe fittings threads directly into it, creating a watertight seal. We recommend Blu-Lock fittings and pipe for their superior speed of installation, flow, flexibility, and releasability. The 1/2-in. Blu-Lock x Spiral Barb adapter is the perfect way to transition from existing swing pipe to Blu-Lock. For non-constant pressure outdoor irrigation use with cold water only.