What is a double check detector assembly?
The Double Check Detector Assembly (DCDA) is an outgrowth of the double check valve and is primarily utilized in fire line installations. It consists of two spring loaded check valves, a by-pass assembly with water meter and double check valve, and two tightly closing OS & Y gate valves.
What is a double detector check?
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 have a meter to detect ground leaks and unauthorized illegal taps.
What are double check valves used for?
A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination.
Why do I need a double check valve?
Double check valves protect the water supply from the risk of backflow and back siphonage in domestic homes and commercial buildings, ultimately preventing potential contaminants getting into other parts of the system, especially drinking water.
Where is a double check valve used?
The double check valve assembly is suitable for prevention of back pressure and back siphonage, but is not suitable for high hazard applications. It is commonly used on lawn irrigation, fire sprinkler and combi-boiler systems.
Should I remove backflow preventer for winter?
You have now properly winterized your PVB. If you do not plan on watering your landscape during the winter you can leave your backflow winterized until the temperatures start to climb. If you do water during the winter then you will perform this winterization process before each freeze.
What kind of double check valve does Apollo VA use?
Double Check Valve The 2 ½” – 12” Backflow Preventer shall be an Apollo® Model DCLF 4A Lead Free* Double Check Valve. The assembly shall be manufactured in America and carry a 5-year Apollo® factory warranty. The TriForceTM center stem guided check valves shall feature reversible silicone rubber seat discs.
Is the Apollo check valve made in America?
The top accessed modular check valve cartridges provide captured springs, replaceable seats and reversible silicone seat discs. This Made in America assembly features Apollo® ball valves with stainless steel handles and nuts as standard and carries the five-year Apollo® factory warranty.
What kind of coupling does Apollo ball valve test cocks use?
Access to the check valves shall be by an Apollo® quick-connect SS coupling (2 ½” – 6”) or grooved couplings (8” – 12”). The bodies shall be domestic SS in 2 ½” – 8” sizes and FDA epoxy coated ductile iron in 10” & 12” sizes. The Lead Free* Apollo® domestic ball valve test cocks shall have SS handles.