Watts 957-DNRS-FS 2 1/2 - Part of the 957 Series Basement Window Well This 3/4 inch freeze resistant

This 3/4 inch freeze resistant pressure vacuum breaker backflow preventer helps prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage

Built-in openings on each side for rebar to anchor the channel to a prepared base

will not rot/mildew

Suitable for driveways

Z668-6IG-TS

Watts 957-DNRS-FS 2 1/2 - Part of the 957 Series Basement Window Well This 3/4 inch freeze resistantThis 2 1 2 inch stainless steel reduced pressure zone assembly backflow preventer help stop the reverse flow of liquids due to backpressure or backsiphonage, where potential health hazard exists. This extremely compact and lighter than a traditional designed assembly is approved for horizontal installation in accordance with the direction of the flow arrow. This assembly consists of a stainless steel body with a quick access sleeve, torsion spring