Watts - 1" Anti-Siphon Pressure Vacuum Breaker

Series 800M4QT is designed to prevent back-siphonage of contaminated water into a potable water supply. The valve is ideally suitable for irrigation systems, industrial process water systems and other continuous pressure piping system applications where the water enters the equipment at or below its flood rim. The disc float and check valve are suitable for temperatures up to 140°F. The resilient sealing float o-ring and seal check disc are silicone rubber which is resistant to heat, shock and chemical attack.

Features

• Replaceable plastic seat
• Easy maintenance of internal parts
• Acetal bonnet acts as “freeze plug" to prevent body damage
• O-ring bonnet seal for less possibility of fouling
• Silicone seat disc for durability
• Test cocks positioned for easy testing and winterization
• Compact space saving design
• Standardly equipped with tee handle quarter turn ball valve shutoffs 1⁄2" – 1" (15 – 25mm). The 11⁄4" – 2" (32 – 50mm) feature lever handles
• No special tools required for servicing
• Bronze body for durability

Specifications
An anti-siphon pressure vacuum breaker shall be installed where indicated on the plans to prevent the back-siphonage of contaminated water. This assembly is not to be used where there is a possibility that a back pressure condition may develop. The assembly will incorporate an acetal bonnet with silicone rubber O-ring seal and silicone rubber seat disc. The valve shall have replaceable seats. Check assembly shall be guided over its full stroke by ‘V’ notched guides. The assembly shall meet the requirements of ANSI/ASSE Standard 1020. Watts Series 800M4QT.

Materials

• Springs: Stainless Steel
• Bonnet: Celcon
• Vent Disc: Silicone Rubber
• Disc Holder Float: Polypropylene
• Check Valve Disc: Silicone Rubber
• Check Valve Seat: Noryl Plastic
• Body: Bronze

Pressure - Temperature

• Temperature Range: 33°F to 140° (0.5°C to 60°C)
• Maximum Working Pressure: 150 PSI (10.3 bar)