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The TORO R728001 is a replacement cap and cover assembly for an anti-siphon valve (ASV), designed to restore the top-end integrity of the valve body in residential and light commercial irrigation systems. The assembly fits valve sizes from 3/4 inch through 1 inch, covering the most common residential zone valve sizes in use today. Irrigation technicians and plumbing professionals install this component when the existing cap shows cracking, seal failure, or physical damage that compromises the valve's backflow protection function. Replacing only the cap and cover assembly avoids a full valve replacement, reducing material cost and labor time on the service call.
This assembly is suited for in-ground irrigation systems where ASVs are installed at the zone-valve manifold or at individual lateral connections. It is used in applications where the valve is exposed to UV, freeze-thaw cycling, or mechanical impact that degrades the plastic cap over time. The part number R728001 is cross-referenced in Irritrol-branded valve documentation, indicating compatibility with that product line under TORO's brand umbrella.
Designed as a cap and cover assembly replacement for 3/4 inch to 1 inch anti-siphon valves within the TORO and Irritrol product line, based on manufacturer part number R728001.
Installation should be performed by a licensed irrigator, plumber, or qualified technician. Shut off the irrigation system water supply and depressurize the affected zone before disassembling the valve. Follow local plumbing codes and manufacturer torque guidance for plastic valve fittings to avoid cracking the valve body during reassembly. Inspect the valve seat and diaphragm for wear while the cap is removed.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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