Durapipe ABS VKD Double Union Ball Valve EPDM Durapipe ABS VKD Double Union Ball Valve Plain EPD Durapipe ABS VKD Imperial DU Ball Valve Plain Lock E Durapipe ABS VKD Metric DU Ball Valve Plain Lock E Durapipe ABS VKR Metering Ball Valve EPDM Durapipe ABS VXE Double Union Ball Valve EPDM