Watts 800M4-FR 1 1/4 - Part of the 800M4FR Series mainline-siltfence Raised external water dam to

Raised external water dam to establish controlled overflow level

available in a 100' roll length

a 5″ diameter heel-proof aluminum grate

offering a sleek

and alternative domes or strainers to suit project-specific needs

Watts 800M4-FR 1 1/4 - Part of the 800M4FR Series mainline-siltfence Raised external water dam toThis 1 1 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. It consists of bronze body construction, silicone rubber check valve disc, plastic check valve seat, stainless steel springs, a bonnet with silicone rubber O ring seal, a lightweight plastic disc float, a built in relief valve to protect the internal components