Rain Bird 3/4" Anti-Siphon Irrigation Valve DASASVF075 — 24VAC, Flow Control & Vacuum Breaker

This commercial-quality anti-siphon valve is built for controllers that use 24 VAC and installs easily inline with 3/4" female pipe thread fittings. Engineered for durable performance in irrigation zones, it combines a reverse-flow diaphragm design, a top-mounted flow adjustment knob, and an automatic/manual bleed vacuum breaker to protect water supplies and tune sprinkler output for uniform coverage.

How does this valve protect my water supply and system?

The DASASVF075 includes Rain Bird’s patented vacuum breaker and a reverse-flow diaphragm that helps keep the valve closed if the diaphragm fails, reducing the risk of backflow or flooding. The valve must be installed at least 6 inches above the highest sprinkler head to function as intended.

• Patented vacuum breaker with bleed screw for automatic or manual operation
• Reverse-flow diaphragm design minimizes internal failure consequences
• Meets I.A.P.M.O. and A.S.S.E. listings plus Canadian Standards Association approval

Can I adjust flow for better sprinkler performance?

Yes — a top-mounted, easy-turn flow control knob gives precise adjustment to reduce misting and balance zone distribution. This lets you optimize uniformity across heads without changing nozzle sizes.

• Flow range: 0.2 to 22 GPM for flexible zone sizing
• Simple knob operation for on-the-spot tuning
• For flows under 3 GPM or drip systems, install a 200-mesh filter before the valve

What are the key durability and compatibility features?

Constructed for long service life, the valve uses a Buna‑N (nitrile) diaphragm, a captive spring and a low-power encapsulated solenoid with a captured plunger. Stainless-steel fasteners and heavy-duty housing resist corrosion in outdoor installations.

• 24 VAC compatible with standard irrigation timers/controllers
• Buna‑N diaphragm and water filter for harsh water resistance
• Energy-efficient solenoid design for lower electrical draw and longer life

How should I install and maintain this anti-siphon valve?

Install the valve above ground, at least 6" higher than the highest sprinkler head on that zone, and avoid adding downstream valves. Before starting the system, manually flush dirt and debris through the external bleed screw to protect the diaphragm and downstream equipment.

• 3/4" female pipe thread inlet and outlet for straightforward plumbing
• Flush system through external bleed screw after installation and before first run
• Do not place other valves downstream of the anti-siphon valve

Who is this for: The Rain Bird DASASVF075 is ideal for landscapers, irrigation professionals and homeowners who need a robust above-ground anti-siphon valve for residential or light commercial zones. It suits anyone seeking a reliable, adjustable valve that meets recognized plumbing standards and handles a wide flow range while protecting the potable supply.

Features:

• Professional grade 3/4" anti-siphon valve with flow control; compatible with any standard sprinkler timer
• Designed for above ground installation, will prevent back flow when properly installed 6" above highest sprinkler head
• Operates automatically or manually with manual bleed screw
• Reverse Flow design reduces stress on diaphragm for dependable operation
• Energy efficient, low power encapsulated solenoid with captured plunger
• Buna-N diaphragm provides superior performance in harsh water environments
• Flow Range 0.2 to 22 GPM; for less than 3 GPM flow or Drip applications install a 200 mesh filter before the valve