The Watts 0792038 LF288A-1/2" Anti-Siphon Vacuum Breaker is a critical backflow prevention component designed to protect potable water supplies from backsiphonage in high-hazard applications. This lead-free atmospheric vacuum breaker features a durable brass body and a 1/2-inch female NPT connection, making it a direct replacement for legacy models 0336400, 288A-1/2, and LF288A-1/2. Built for industrial and commercial environments, it utilizes a chemical-resistant silicone seat disc that ensures tight sealing even under low-flow conditions. The lightweight disc assembly is engineered to prevent spillage across all flow rates, while the full-size orifice maintains maximum pipe capacity with minimal pressure drop. Ideal for laboratory equipment and non-continuous pressure systems, this valve operates efficiently in both hot and cold water cycles up to 180°F. For veteran contractors, the Watts LF288A 1/2 provides a reliable, code-compliant solution for backsiphonage protection in sensitive HVACR and plumbing cross-connections. Key Benefits Lead-Free Brass Construction: Ensures compliance with safe drinking water standards and modern building codes. High-Temperature Resistance: Rated for up to 180°F (82°C), suitable for demanding hot water backflow prevention. Optimized Flow: Features a streamlined water passage and a large orifice to maximize throughput and reduce system friction. Versatile Installation: Standard 1/2-inch FNPT inlet and outlet simplify drops and replacements in existing piping layouts. Silicone Seat Durability: Offers superior resistance to water hammer shock and chemical degradation compared to standard rubber seals. Common Questions Can the Watts LF288A be used under continuous pressure? No, atmospheric vacuum breakers like the Watts 0792038 are designed for non-continuous pressure applications only. They should not be pressurized for more than 12 hours in any 24-hour period to ensure the internal float functions correctly. Where should this vacuum breaker be installed? For proper atmospheric vent operation, the unit must be installed at least 6 inches above the highest point of the downstream piping or the flood rim of the equipment being served. Will this valve protect against backpressure? The LF288A series is specifically designed for backsiphonage protection only. It is not rated to handle backpressure conditions; for those applications, a reduced pressure zone (RPZ) or double check valve assembly is required. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
