The Irritrol 2711APR 3/4" Anti-Siphon Valve is a professional-grade irrigation valve that safely combines automated zone control with essential backflow prevention. Unlike standard globe valves that require a separate backflow preventer, this 2700 Series model features a built-in atmospheric vacuum breaker. This critical mechanism automatically stops dirty irrigation water from siphoning backward into your home's clean drinking water supply.
What sets the APR model apart is its rugged stainless steel screw bonnet. Designed for exposed, above-ground installations, this heavy-duty 4-bolt top provides exceptional resistance against system pressure spikes and long-term UV degradation. Whether you are running a small landscape zone or pushing up to 30 GPM through 3/4" Polyethylene Mainline Tubing, this hardwired 24V AC valve delivers maximum reliability and fine-tuned precision via its integrated flow control dial.
Detailed specifications for system planning.
| Specification | Details |
|---|---|
| Valve Configuration | Anti-Siphon (Must be installed above ground) |
| Top Design | Screw-Top Bonnet (Stainless Steel Screws) |
| Operating Flow Range | 0.25 to 30 Gallons Per Minute (GPM) |
| Operating Pressure Range | 10 to 150 PSI |
| Inlet / Outlet Size | 3/4" Female Pipe Thread (FPT) |
| Solenoid Power | 24 VAC (Electric) |
Follow these critical steps to safely install your anti-siphon valve.
Step 1: Determine Elevation
Anti-siphon valves MUST be installed at least 6 inches higher than the absolute highest point in the irrigation zone they serve (including the highest emitter or uphill pipe). Do not bury this valve.
Step 2: Plumb the Connections
Using Teflon tape on the threads, attach 3/4" male PVC adapters to the inlet and outlet. Ensure the water flow matches the directional arrows molded onto the side of the valve body.
Step 3: Connect the Wiring
Run direct burial wire from your 24V AC controller to the valve. Connect one solenoid wire to the common wire, and the other to the designated station wire. Use silicone-filled waterproof wire nuts for a secure splice.
Step 4: Flush and Adjust
Turn on the water supply and use the manual bleed screw to flush out any debris. Once running clean, close the bleed and use the center flow control dial to adjust the water output to your desired pressure.
Can I bury this anti-siphon valve in an underground box?
No, you cannot bury an anti-siphon valve. The built-in atmospheric vacuum breaker requires open air to function properly. If submerged in a flooded valve box, it will suck dirty water directly into your drinking supply.
What is the advantage of the stainless screw bonnet?
The 4-bolt stainless steel screw bonnet provides maximum structural integrity. It is highly resistant to extreme water pressure spikes and resists UV degradation better than standard plastic jar-top valves in above-ground installations.
How high above ground does the valve need to be?
The bottom of the valve must be installed a minimum of 6 inches above the absolute highest point in the entire irrigation zone it controls to effectively prevent back-siphonage.
Does this valve run on batteries?
No, this valve includes a 24V AC solenoid. It must be hardwired to an indoor or outdoor plug-in irrigation controller and will not function with a battery-operated DC timer.
Why is mid-May the perfect time to install a heavy-duty anti-siphon valve?
As mid-May warmth arrives, homeowners heavily apply spring fertilizers and pesticides. Upgrading to a durable, above-ground anti-siphon valve now ensures these toxic chemicals cannot be siphoned back into your drinking water during daily summer irrigation cycles.
Furthermore, the heavy-duty screw bonnet protects the valve internals from the harsh summer sun that is just around the corner.
Before purchasing, please verify your system design:
Ensure a professional and safe installation with these essential electrical accessories:
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