Series 909 Large prevents the reverse flow of liquids in a plumbing system due to backpressure or backsiphonage where there is a potential health hazard. An exclusive relief valve design provides substantially improved relief valve discharge performance during emergency conditions of combined backsiphonage and backpressure. The seats are replaceable for economical repair. It consists of a cast iron body construction, bronze ball valve shutoffs, and bronze test cocks Large diameter 2 1/2 to 10 inch sizes.

The coating on this backflow assembly uses ArmorTek technology, a patented 3-part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion.

To learn more visit: https://www.watts.com/armortek

• Series 909 Large prevents the reverse flow of liquids in a plumbing system due to backpressure or backsiphonage where there is a potential health hazard. An exclusive relief valve design provides substantially improved relief valve discharge performance during emergency conditions of combined backsiphonage and backpressure. The seats are replaceable for economical repair. It consists of a cast iron body construction, bronze ball valve shutoffs, and bronze test cocks Large diameter 2 1/2 to 10 inch sizes.
• Exclusive relief valve design provides maximum capacity during emergency conditions
• Industrial strength sensing hose on larger size models
• Can be used in a variety of installations, including containment at the service line entrance
• No special tools required for servicing
• The valve body shall utilize a coating system with built in electrochemical corrosion inhibitor and microbial inhibitor
• Utilizes advanced ArmorTek coating technology to resist corrosion of internals

Weight	10.0 lb
Connection Size	1/2 in.
Height	9.00 in.
Horse Power	1/3
Length	7.94 in.
Type	Reduced Pressure Zone (RPZ) Assemblies
Width	3.63 in.
Inventory Number	WAT0009392
MPN	0009392