Typical Backflow Assemblies

This is a specially designed assembly composed of a line-size approved double check valve assembly with a bypass containing a specific water meter and an approved double check.

The meter shall register accurately for rates of flow up to 2 gallons per minute and shall show a registration for all rates of flow.

This assembly shall only be used to protect against a non-health hazard. The double check detector is primarily used on fire sprinkler systems.

This assembly composed of two independently acting, approved check valves, including tightly closing resilient seated shutoff valves attached at each end of the assembly and fitted with properly located resilient seated test cocks.

This assembly shall only be used to protect against a non-health hazard.

This assembly permits the attachment of portable hoses to hose thread faucets and prevent the reverse flow of polluted water from entering into the potable water supply due to back siphonage.

It consists of a brass body construction, stainless steel working parts, a rubber diaphragm and disc, a draining stem, and a break away set screw for tamper-resistant installations.

The Hose Bibb Vacuum is primarily used on outside water faucets.

Contains an independently operating, internally loaded, check valve and an independently operating loaded air inlet valve located on the discharge side of the check valve. The assembly is to be equipped with properly located resilient seated test cocks and tightly closing resilient seated shutoff valves attached at each end of the assembly.  

This assembly is designed to protect against a non-health hazard or a health hazard under a backsiphonage condition only.

This is a specially designed assembly composed of a line-sized approved reduced pressure principle backflow prevention assembly with a specific bypass containing a specific water meter and as approved reduced pressure principle backflow prevention assembly.

The meter shall register accurately for rates of flow up to 2 gallons per minute and shall show a registration for all rates of flow.

This assembly may be used to isolate health or non-health hazards.

This includes two independently acting, spring-loaded check valves with a hydraulically operating, mechanically independent, spring-loaded pressure differential relief valve in between.

It is effective against backpressure backflow and back-siphonage and may be used to isolate health or non-health hazards.