Toro T-YD-500-34 1/2" Air/Vacuum Relief Valve (1/2" MIPT)

The Toro T-YD-500-34 1/2" Air/Vacuum Relief Valve provides reliable air venting for landscape and drip irrigation systems. Designed for installation at system high points, this valve quickly vents trapped air and relieves vacuum conditions during shutoff, helping prevent tubing collapse and uneven emitter flow.

• Part number: T-YD-500-34 — compact air/vacuum relief valve for dripline systems.
• Inlet thread: 1/2" MIPT for standard 1/2-inch threaded fittings.
• Operating pressures: Vent closing pressure 4 PSI; vacuum relief pressure 4 PSI; maximum operating pressure 100 PSI.
• Dimensions & weight: Body dimensions approximately 1.460" x 0.980" x 0.980"; weight about 0.25 oz.
• Recommended placement: Install at the highest point(s) of each irrigation zone; use one valve per high point and consult the system layout for spacing and required quantities.
• Compatibility: Intended for use with Toro DL2000 series driplines and common landscape drip tubing and fittings.

Refer to the product sell sheet and the Landscape Dripline Design guide for installation details, performance tables, and preventive maintenance recommendations. Routine visual inspection and clearing debris from the inlet keep the valve operating reliably; the threaded 1/2" connection enables quick installation with standard fittings.