The Wilkins Model 460 is ideal for use where Lead-Free* valves  (*Less than 0.25% Weighted Average Lead Content) are required. Designed for installation on indoor and outdoor point of use applications to protect against backsiphonage of contaminated water into the water supply. During start-up and operation, a separate diaphragm seals the air inlet from the water supply preventing spillage. The assembly is designed for use under constant pressure and provides protection where a potential health hazard exists. 

FEATURES

• This device is available in three sizes; 15mm, 20mm and 25mm.
• Maximum working water pressure: 1050kPa
• Maximum working water temperature: 82°C
• Hydrostatic test pressure: 2100kPa

TYPICAL INSTALLATION

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be installed in accordance with the manufacturers’ instructions and the latest version of the Uniform Plumbing Code. The critical level mark on the assembly shall be mounted at a minimum of 12” (305mm) above the highest downstream piping or outlet. Install with sufficient side clearance for testing and maintenance. The installation shall insure that no part of the assembly can be submerged. A spill-resistant pressure vacuum breaker cannot be installed where back-pressure could occur.