The Zurn Wilkins 700XL Dual Check Valve is a non testable device used in low hazard potable water applications.

Designed for use in non-health hazard cross-connections and continuous pressure applications subject to backpressure or backsiphonage incidents, such as lawn sprinklers, fire sprinkler lines, commercial pools, tanks and vats, and food cookers. Have a question or two? Visit our Customer Support page to find the answers you're looking for.

Double Check Valve Assembly (DCVA) This article discusses underground and above-ground installations of a double-check valve assembly. A Guide To Understanding The Double Check Valve Assembly

Series LF709 Lead Free* double check valve assembly backflow preventers help stop the reverse flow of polluted water from entering into the potable water supply. This series has a modular …

It consists of a compact construction and short lay length, ideal for retrofit installations. This assembly features a lightweight stainless steel body and low head loss. The OSY-TS model is available with a durable, robust, UL Listed tamper switch that signals when the valve is closed or when the tamper switch is removed from the valve.

MODELS DCVA-200, DCVAM-200 4-way control valve designed to operate a two-way hydraulic circuit from a single hydraulic source. SINGLE ACTING USE (MODEL DCVA-100 & MODEL DCVAM-100) & DOUBLE ACTING USE (MODEL DCVA-200 & MODEL DCVAM-200) INSTALLATION: CAUTION: CONTAMINATION – Energy strongly recommends the

A DCVA is a mechanical backflow preventer that consists of two independently acting, spring-loaded check valves. It includes shutoff valves at each end of the assembly and is equipped with test cocks. A DCVA is effective against backpressure backflow and backsiphonage but should be used to isolate only non-health hazards.

2019年7月2日 · The double check valve device assembly (DCVA) is a backflow prevention device used for backflow prevention of low hazard non-potable water into a potable water system or to separate two potable water system. It consists of two independently acting spring load closed check valves and four test cocks.

The DCVA is effective against backflow caused by backpressure and backsiphonage and is used to protect the water system from pollutants that would not constitute an actual health hazard, but that might be objectionable to the water supply system. The DCVA is used to isolate non-health hazards (see Figure 2-15).

1. The DCVA must be on the State-approved list and must be installed in compliance with the District’s Premise Isolation Cross Connection Control Policy (please see drawing for reference). 2. The state of Washington has adopted the University of Southern California’s (USC) 10th edition Approved Backflow Device list as its approved list.