Series 66 gate valve with HDPE Fusible Pipe Ends is, typically used for on/off service; it is not designed to control flow.  These valves are typically used in buried installations.  HPDE is gaining popularity in North America as it does not leak, is resistant to corrosion, does not allow biological growth, and has superior seismic resistance.

The Series 66 Gate Valve conforms to the requirements of AWWA C515, the standard for “Reduced Wall, Resilient Seated Gate Valves for Water Supply Service”, and is in compliance with NSF 61 and NSF 372 standards for drinking water system components.  It is not UL Listed or FM Approved as neither of these agencies have standards which cover valves with PE Ends.