Description Knee polyethylene is used to connect polyethylene pipes to valves and male threaded connections at a 90-degree angle. This product can withstand pressures up to 10 atmospheres. The body and head are made of cold-resistant polypropylene copolymer. Split ring made of polystyrene and O-ring made of rubber is very suitable for optimal sealing - no water leakage - as well as high tensile strength. In addition, the O-material of this product is also used in drinking water piping. Other features of the connections include easy opening and closing. For more information, call 09339765265 Call 09123261608.