Valves are an integral part of plumbing and heating systems. They can be used for isolating zones, appliances or just stopping the flow of water for a particular fixture in your house. PEX valves have many connection options F1807 Crimp, F1960 Expansion and F2080 Expansion.
F1807 – uses PEX insert fittings that are crimped in place, using a copper crimp ring, a stainless ring with ears (Oetiker) or a stainless sleeve. Also, the fittings are available in both lead free brass and poly (PPSU). This method can be used on all PEX tubing types (A, B or C)
F1960 – the PEX pipe is expanded and uses a ring made out of PEX to complete the connection. The fittings are available in both lead free brass and poly (PPSU). This method is only recommended for use on PEX-a or PEX-c tubing.
F2080 – the PEX pipe is expanded but this time but this time are the fitting is inserted a brass or poly ring is pulled over the connection using a tool. This is said to be the most secure PEX connection type. The fittings are available in both lead free brass and poly (PPSU). This method is only recommended for use on PEX-a or PEX-c tubing.
PEX or Cross-linked polyethylene, is a form of polyethylene that has been cross-linked to improve overall strength. There are three common ways of performing the cross-linking, Saline (PEX-b), Engel (PEX-a) or Irradiation (PEX-c). It is formed into tubing, and is used predominantly in domestic water piping, hydronic radiant heating and cooling systems.