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Hunter ICV 3" Diaphragm Assembly - Part 518900

Hunter ICV 3" Diaphragm Assembly - Part 518900

Brand: Hunter
Save 28%
$47.52
$34.45
SKU 518900

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Replacement diaphragm assembly specifically engineered for Hunter ICV 3-inch valves (ICV-301). Part 518900 (also referenced as 518900SP) restores reliable sealing and flow control without replacing the entire valve body.

  • Direct fit for 3" ICV valves: Designed to replace the factory diaphragm in Hunter ICV 3-inch valves (ICV-301), restoring proper valve operation and preventing leaks.
  • Fabric-reinforced EPDM construction: The diaphragm is manufactured from fabric-reinforced EPDM rubber for strong resistance to chlorine, abrasion and system wear.
  • Durable diaphragm seat: Engineered diaphragm seat materials resist grit and high wear to maintain a long service life in challenging water conditions.
  • Field-serviceable replacement: Swap the diaphragm assembly in the valve bonnet for fast repair—no need to excavate or replace the valve body in most cases.
  • OEM part identification: Matches Hunter part numbers 518900 / 518900SP and corresponds to the diaphragm assembly listed in Hunter ICV parts catalogs and manuals.
  • Quality-tested performance: Built to the Hunter ICV design standards for operation up to typical system pressures and long-term reliability.

Before servicing any valve, shut off the water supply and relieve system pressure. Consult the Hunter ICV installation and service manual for step-by-step instructions or contact a qualified irrigation professional. This listing is for the diaphragm assembly only; other valve components shown in manuals are not included.

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Frequently Asked Questions

What Hunter valve models is this diaphragm compatible with?
This diaphragm assembly is made for Hunter ICV 3-inch valves (ICV-301). It corresponds to Hunter part 518900 (also sold as 518900SP).
What material is the diaphragm made from and why does it matter?
The diaphragm is fabric-reinforced EPDM, chosen for resistance to chlorine, abrasion and normal system wear to extend service life.
How do I replace the diaphragm safely?
Shut off water and relieve pressure before opening the bonnet. Replace the diaphragm assembly per the Hunter ICV service instructions or hire a qualified technician.