Watts 88004112 LF009M3QT 1" Backflow Preventer Lead-Free

The Watts 88004112 is no longer manufactured, but it was a 1-inch lead-free reduced pressure zone backflow preventer. These devices are more commonly used in plumbing systems to protect clean drinking water than in HVAC equipment. They prevent contaminated water from returning to the clean water supply through backsiphonage or backpressure. Backflow can occur when a hose is submerged in a pool or when using a pressure washer. The Watts 88004112 offered this protection through a combination of check valves and a pressure relief valve. This model has been discontinued, but similar backflow preventers are still required for safe and compliant plumbing installations.