Asked by: Youssouph Mutegui
asked in category: General Last Updated: 19th January, 2020

What is a double check valve assembly?

A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. It consists of two check valves assembled in series.

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Accordingly, what are double check valves used for?

Double check valves are specifically designed to protect water supplies from contamination and are used to safeguard the water supply to millions of domestic and nondomestic properties nationwide.

Secondly, do double check valves restrict flow? Understanding Check Valves: Sizing for the Application, Not the Line Size. Simply put, a check valve allows flow in one direction and automatically prevents back flow (reverse flow) when fluid in the line reverses direction. They are one of the few self-automated valves that do not require assistance to open and close.

Simply so, what is the difference between a double check valve and a backflow preventer?

The main thing to take away from this is that both backflow prevention device types perform the same function when they are operating properly, but only the RPZ is designed to protect the public water supply by disposing of any backwards-flowing water if any of the check valves or the relief valve fails.

Can a double check valve be installed vertically?

There are backflow preventers that can be installed horizontally, vertically (up or down) and other orientations that can make an installation easier. The key point to realize however is that they can only be installed in the orientation that the approval agency has determined they will work in.

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