This 1 Inch Anti-Siphon Vacuum Breaker Backflow Preventer Helps Prevent The Backsiphonage of Contaminated Water From Entering Into The Potable Water Supply. It is Ideal For Low Flow Non-Continuous Pressure Installations Such as Residential Irrigation Systems or Laboratory Equipment. This Vacuum Breaker Consists of a Brass Body With Bronze Internal Trim, Chemical Resistant Seat Disc And an Atmospheric Vent to Prevent Spilling. The Durable Silicone Disc is Suitable For Temperatures up to 180 Degrees F (82 Degrees C) And Ensures Tight Seating With The Lightest of Seating Contacts. The Maximum Working Pressure is 125 psi (8.6 Bar). | Watts | 0340972