Watts LF800M4-QT Anti-Siphon Backflow Preventer

Description:

The Watts LF800M4-QT Anti-Siphon Backflow Preventer is a 3/4 inch pressure vacuum breaker designed to protect potable water systems from backsiphonage and contamination caused by reverse flow conditions. Commonly installed in irrigation systems, lawn sprinkler networks, agricultural water systems, commercial landscaping applications, industrial washdown stations, and process water distribution systems requiring reliable backflow protection. Maintenance personnel, plumbing contractors, irrigation specialists, OEMs, and facility operators use this device for code compliance, system upgrades, replacement projects, and new installations requiring dependable cross-connection control.

Applications:

The Watts LF800M4-QT Pressure Vacuum Breaker is widely used in residential and commercial irrigation systems, golf courses, parks, athletic fields, greenhouses, agricultural water distribution networks, schools, hospitals, apartment complexes, hotels, manufacturing facilities, municipal water systems, cooling equipment, washdown stations, and landscape maintenance operations. The device prevents contaminated water from being siphoned back into the potable water supply during pressure loss conditions, helping maintain water quality and regulatory compliance. It is commonly specified in applications where local plumbing codes require approved backflow prevention assemblies to protect drinking water systems from fertilizers, pesticides, chemicals, and other potential contaminants.

Technical Specifications:

• Manufacturer Part Number (MPN): LF800M4-QT
• Brand: Watts
• Product Type: Anti-Siphon Backflow Preventer / Pressure Vacuum Breaker
• Series: 800M4-QT
• Connection Size: 3/4 in.
• Connection Type: Female NPT
• Body Material: Lead-Free Bronze
• Bonnet Material: Engineered Polymer
• Shutoff Valves: Quarter-Turn Ball Valves
• Test Cocks: Included
• Backflow Protection Type: Backsiphonage Prevention
• Check Valve Type: Spring Loaded
• Service Media: Potable Water
• Installation Orientation: Vertical
• Lead-Free Construction: Yes
• Application: Irrigation and Water Distribution Systems
• Function: Cross-Connection Control and Backflow Prevention
• Compliance: ASSE 1020 and CSA Certified Models Available
• Suitable For: Residential, Commercial, and Industrial Water Systems

Common Replacements:

• Febco 765 3/4" Pressure Vacuum Breaker
• Zurn Wilkins 720A 3/4" Pressure Vacuum Breaker
• Watts 800M4-FR 3/4" Pressure Vacuum Breaker Assembly