3/4 800M4QT PRSSR VAC BRKR

🚰 What it is

It is a 3/4-inch anti-siphon pressure vacuum breaker (PVB) used to prevent contaminated water from flowing backward into potable water supplies.

⚙️ What it does

This device protects plumbing systems by:

• Preventing back-siphonage (dirty water being sucked back into clean water lines)
• Automatically opening to air when pressure drops
• Maintaining safe separation between irrigation/process water and drinking water

🔧 Key features

• Model: Watts 0792011 / LF800M4QT series
• Size: 3/4 inch FNPT threaded connections
• Type: Pressure Vacuum Breaker (PVB)
• Built-in quarter-turn shutoff valves
• Rated pressure: up to 150 PSI
• Temperature range: ~33°F to 140°F
• Lead-free copper alloy body
• Test cocks for inspection and winterization (turn0search3)

🏗️ Where it’s used

• Irrigation sprinkler systems
• Lawn and landscape watering systems
• Industrial/process water lines
• Any system requiring cross-connection protection

🧠 Simple explanation

It’s basically a safety valve that keeps dirty irrigation or system water from ever flowing backward into your drinking water supply.

⚠️ Important note

• Often required by plumbing code for irrigation systems
• Must be installed above ground level (not buried)
• Needs proper clearance for air intake and service testing