The reliable brass body and glass-filled nylon bonnet equips these valves to withstand extreme pressure surges, effluent water and clogging debris. For additional protection, the BPES model features a patented scrubber mechanism to actively fight dirt and particles. It has a unique hybrid construction featuring durable red brass body and glass-filled nylon bonnet for long life at a value price. It also has a durable, fabric-reinforced diaphragm for longer life.