Watts - 1" Anti-Siphon Vacuum Breaker

The Watts 188A Anti-Siphon Vacuum Breaker is engineered to prevent backsiphonage in irrigation systems and other non-potable water applications. Constructed from durable brass and bronze with a high-heat resistant silicone seat disc, this vacuum breaker meets stringent health and safety standards, including ASSE 1001 and CSA B64. Designed for intermittent pressure usage, it features a self-sealing disc float mechanism that reliably opens and closes the atmospheric vent. Ideal for use in residential and commercial irrigation systems, it is easy to install and maintain, offering dependable protection against contaminated backflow.

Key Features:

• Prevents backsiphonage of polluted water into potable supply lines
• Non-spill disc float design seals atmospheric vent at all flow rates
• Durable brass body with bronze internal trim for corrosion resistance
• Silicone seat disc resists high temperature and water hammer shock
• Approved by ASSE 1001, ANSI A112.1.1, and CSA B64 standards

Technical Specifications:

• Connection Size: 1" NPT
• Operating Pressure Range: 2–125 PSI
• Maximum Operating Temperature: 180°F (82°C)
• Material: Brass body, bronze internals, silicone disc
• Flow Control: Yes
• Outer Diameter: 2-1/2"
• Use Limitation: Not for continuous pressure; max 12 hours in 24
• Installation Height: Must be 6" above the highest downstream piping
• No downstream shutoff valves permitted

Installation & Application:

• Ideal for residential and commercial irrigation systems
• Designed for non-potable water service applications
• Install in vertical orientation 6" above downstream piping
• Install only where occasional discharge is acceptable

Compatibility & Optional Accessories:

• Fits irrigation tubing sizes from 3/4" to 2"
• Compatible with standard NPT-threaded pipe fittings

Protect your irrigation systems with the reliable Watts 188A Vacuum Breaker. Explore compatible backflow solutions and irrigation accessories to ensure your setup stays code-compliant and efficient.