Double Check Detector Assemblies are designed to prevent backflow of non-health hazard substances from being pumped or siphoned into the potable water supply. Certain models …

Series 757DCDA, 757NDCDA Double Check Detector Assemblies prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. …

Series 774DCDA Double Check Detector Assembly Backflow Preventers are designed to prevent the backflow of fire protection system substances from being pumped or siphoned into the …

These Wilkins 350 Series double check valve assemblies, manufactured by Zurn, are designed for installation on water lines to protect against both back-siphonage and back-pressure of …

2020年10月21日 · ddcva size* 6" - 10" 12" vault no 577-la 687-la 5106-la p r i vat e 0.1. spool (rj) concrete vault w/ ladder & bilco style lid (see approved materials list) ... install alarm system & …

This article discusses underground and above-ground installations of a double-check valve assembly. Before installation, run the main irrigation supply line from the isolation valve to the …

HERSEY DDC 11 SIZE 3", 4", 6", 8", 10 DESCRIPTION This is a double check detector assembly. Production was begun approximately in 1975 and was discontinued in 2004. It …

Its compact epoxy coated cast iron unibody and modular check design facilitate simple and easy installation and maintenance. Maximum Working Pressure: 175psi (12.06 bar). "Do not use …

DDCVA INSIDE BUILDING ONLY BY APPROVAL OF DISTRICT ENGINEER. DDCVA SHALL BE ON THE WADOH APPROVED LIST INSTALL VALVE MARKER POST (SEE STANDARD …

The Fire Department Connection (FDC) is a specific type of connection point installed on a building or freestanding in a vault structure to provide a link between the building’s fire …