What Expansion Joint is Best for Plastic Pipe?

Metraloops are an ideal expansion joint for plastic pipe. This is due to the low loads the loop exerts on the pipe. Flanged ends are preferred to prevent cracking of thin wall threaded fittings.

An alternative solution to the Metraloop is the 711 Plus. The 711 Plus is a full face rubber expansion joint with control rods integrated into the flanges on the joint. The integrated control rods prevent excessive stress from being transferred from the expansion joint’s flanges to the plastic flanges.

rubber expansion for nonmetallic
The 711 Plus has integral gusset plates built into the backing ring. The integral gusset plates eliminate the problem of cracks on the plastic flanges due to the bending forces from standard gusset plates.
expansion loop
The typical Metraloop installation is axial for thermal applications, or in any possible direction for seismic applications.
Rep icon Your Local Rep