Plastic Pipe Fittings

Plastic Pipe Fittings connect, branch or change the direction of plastic piping systems. This category covers fittings for materials including PP-RCT and HDPE, while pipes and valves remain outside its scope.

A pipe fitting combines with pipes to form a closed piping route. PP-RCT fittings can be joined by thermal fusion; HDPE is also readily weldable and can be processed in different ways according to the application. Correct material and joining choices allow the fitting and pipe to function as one system.

PP-RCT fittings are used in HVAC, chilled-water, compressed-air and marine water systems. HDPE fittings support water-treatment, marine, cooling and chemical-process systems. The wider plastic-piping range also includes materials such as ABS, PP-H, PVC-U, PVC-C and PVDF.

First match the fitting material to the pipe material and medium. Then check diameter, pressure class, operating temperature and required joining method. PP-RCT is available in SDR 7.4, 9, 11 and 17.6; HDPE pressure systems are supplied mainly in SDR 11 and SDR 17.

Key attributes are plastic material, diameter, SDR class, medium, temperature, pressure duty and joining method, including thermal fusion, socket fusion and butt welding.

Frequently asked questions

PP-RCT pipe fittings can be joined by thermal fusion. Match the method to the dimensions and installation. For Aquatherm Blue, sizes from 20 to 125 mm use socket fusion; sizes from 160 mm use butt-welded connections.

Match the SDR class to the associated HDPE pressure-piping system. ERIKS mainly supplies SDR 11 and SDR 17 for HDPE. Also check the medium and determine which processing method suits the application.