The Plasson DZR Double Check Valve Female 9057 (1in) is a critical inline backflow prevention device designed to safeguard potable water supply networks from contamination caused by back-siphonage or backpressure. It is widely utilized by plumbing, heating, and utility professionals on commercial, industrial, and domestic water systems where strict compliance with water safety regulations is required.
 
Manufactured from high-grade Dezincification Resistant (DZR) brass, this valve provides exceptional structural strength, corrosion immunity, and longevity even when exposed to aggressive water chemistries or subterranean environments. The internal two-stage check mechanism ensures that water flows strictly in a single direction, automatically sealing the line to prevent any back-flow mixing.
 
Engineered for straightforward integration into existing pipe layouts, the fitting features standard 1-inch female BSP threaded connections on both ends. Built to handle demanding operational cycles and high working pressures, this trade-quality double check valve delivers reliable, maintenance-free backflow protection and ensures compliance with essential water supply bylaws.