Watts 800M4FR-FZ 1 - Part of the 800M4FR Series Geotextile creating a durable and flexible

creating a durable and flexible joint filler with a 100-year life cycle

Z325-4NH-DB

is non-biodegradable

an integral 2-inch external water dam

and relief valve spring

Watts 800M4FR-FZ 1 - Part of the 800M4FR Series Geotextile creating a durable and flexibleThis 1 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 and