Dual Check Backflow Preventer with Atmospheric Vent – 20mm Valve for Potable Water Protection Indicator Sets S / 316 Stainless Steel

S / 316 Stainless Steel

Components  Indicator

Suits The Following Units ML727SS_MK11

Outlets: ISO 228/1 ½” and ¾” male threaded connections

Clamp ring features drainage holes for weepage

Dual Check Backflow Preventer with Atmospheric Vent – 20mm Valve for Potable Water Protection Indicator Sets S / 316 Stainless SteelCompact, compliant, and built for backflow protection. The Watts 9D AUS 20mm is a dual check backflow preventer designed to safeguard potable water systems from reverse flow in low hazard applications. It features two independent check valves and an intermediate atmospheric vent that discharges to the atmosphere if a fault occurs ensuring reliable protection in compact installations. Ideal for boiler feeds, autoclaves, lab setups, and food service