The AVTA series is specifically engineered to be insensitive to dirt

exhaust fans

including the RC-4864 (standard)

Operational Longevity: High-durability compound resists chemical degradation from combustion byproducts

maintaining performance even in environments with grease

Watts 88004113 Assembly 320788-704 The AVTA series is specificallyThe Watts 88004113, also known as the LF009M2 QT FS 1 1 4, is a heavy duty Reduced Pressure Zone Assembly engineered to safeguard potable water systems against backpressure and backsiphonage. This 1 1 4 inch unit features a lead free copper silicon alloy body, specifically designed for high hazard cross connections and continuous pressure applications. Its modular internal construction includes two independent check valves and an integrated relief