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Close-up of Toro R726901 diaphragm and stem replacement assembly for 1-inch 300-series irrigation valve, showing black EPDM diaphragm and molded plastic stem components.

Toro R726901 Diaphragm & Stem Assembly — 1" 300 Series

Brand: Toro
Save 27%
$45.68
$33.12
SKU R726901

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Replacement diaphragm and stem assembly (SKU R726901) engineered for Toro 300‑series 1" anti-siphon irrigation valves. Replacing both the diaphragm and stem together restores proper sealing and valve function while reducing the chance of future leaks or performance issues.

  • OEM-compatible construction: EPDM rubber diaphragm paired with precision-molded plastic stem components for consistent sealing and movement.
  • Fits 1" 300-series valves: Designed for 1-inch anti-siphon/anti-syphon valve bodies in the Toro 300 family and compatible replacement applications.
  • Performance benefits: Restores valve responsiveness, improves shutoff reliability, and helps prevent intermittent flow or leakage.
  • Easy replacement: Installs using basic hand tools; replacing the diaphragm and stem together streamlines repairs and reduces repeat service visits.
  • Durable materials: EPDM diaphragm resists wear under normal irrigation use; molded plastic components maintain alignment and actuation precision.
  • What’s included: One diaphragm and stem assembly (assembled, ready to install). Verify SKU R726901 before ordering.

For best results, depressurize the valve before disassembly and follow manufacturer guidance or consult a technician if unsure. If you need help confirming fit for a specific valve model, check the valve model number or contact technical support with the valve serial/model information.

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Frequently Asked Questions

What valve models does this assembly fit?
This R726901 assembly is made for 1" Toro 300-series anti-siphon valves and compatible replacement valve models.
How difficult is installation for this part?
Installation is straightforward with basic hand tools; depressurize the valve, remove the bonnet, swap the diaphragm/stem, and reassemble.
How long will the diaphragm and stem last under normal use?
Lifespan varies with water quality and use, but proper installation and replacing worn parts promptly extends reliable operation.