Dual check valve assembly

Plumbing · Distribution Piping In the House · printed page 267 (PDF page 268)

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Book index entries

Dual Check Valve Assembly Plumbing – Dual Check Valve Assembly Supply Plumbing – In-house

Text in the illustration

Dual check valve assembly
normal operation
water
water flow
check valve (open)
backflow condition
note: mechanism simplified for clarity
check valve (closed)

Generated explanation

Two sectional views show a dual check valve assembly with two spring-loaded check valves arranged in series inside a common housing. In the upper view, normal water flow travels from left to right with both check valves open. In the lower view, a backflow condition is illustrated with water directed from the right and both check valves closed to prevent reverse flow. A note states that the mechanism is simplified for clarity.

Components

dual check valve assembly check valves valve springs valve seats valve housing pipe connections

Related illustrations

1549

Double check valve assembly

· p. 268

Two cutaway views depict a double check valve assembly with upstream and downstream handwheel-operated valves, two spring-loaded check valves in series, and four test ports. The upper view shows normal operation, with bo