Rainbird National Sls DASASVF075 Anti-siphon Valve 3/4 in

Product Description

The RAINBIRD NATIONAL SLS DASASVF075 is a 3/4-inch automatic anti-siphon valve built for professional-grade irrigation applications. It features a reverse flow design that keeps the valve closed in the event of an internal diaphragm failure, reducing the risk of flooding and water waste. An adjustable, top-mounted flow control knob lets technicians tune flow to each zone, helping sprinklers operate at their most efficient rate for uniform coverage. The external bleed screw allows manual flushing of dirt and debris from the system during startup. This valve is rated for residential and light commercial irrigation system installation.

This valve is suited for in-ground irrigation systems where backflow prevention is required at the zone level. The anti-siphon design provides protection against contaminated water being drawn back into the potable supply. It is commonly installed at zone control points in residential lawn and landscape irrigation systems. The external bleed screw supports field flushing before commissioning. Package quantity is five valves per unit, making it appropriate for multi-zone installation projects or service stock.

Key Features

• Reverse flow design keeps valve closed during internal diaphragm failure, limiting flooding risk
• Adjustable top-mounted flow control knob prevents wasteful misting when line pressure is too high
• External bleed screw allows manual system flushing of dirt and debris before startup
• Automatic anti-siphon operation provides zone-level backflow protection
• Professional grade construction for reliable field performance
• Packaged in quantities of five for multi-zone or stock applications

Compatibility

Designed as an OEM-style replacement or new-installation anti-siphon control valve for 3/4-inch residential and light commercial in-ground irrigation systems.

Installation Notes

Installation should be performed by a licensed irrigator or plumbing professional in accordance with local plumbing codes and backflow prevention requirements. Shut off the water supply to the irrigation system before beginning installation or service. After installation and before system startup, flush the system manually using the external bleed screw to clear dirt and debris from the line. Anti-siphon valves must be installed above the highest sprinkler head in the zone to function correctly.