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Product photo of Weathermatic 110-603SA 1-inch Nitro/Silver Bullet diaphragm replacement part, shown against a plain white background, clear top view of part

Weathermatic 110-603SA - 1" Nitro/Silver Bullet Diaphragm

Brand: Weathermatic
Save 44%
$10.37
$5.83
SKU 110-603SA
In Stock (40)

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Replacement diaphragm engineered for Weathermatic 1" Nitro, Silver Bullet and Enduro series valves. Designed as a direct-fit OEM-style part, this diaphragm restores proper valve sealing and dependable irrigation control.

  • Exact fit for 1" Nitro/Silver Bullet valves: Designed to replace worn or damaged diaphragms on compatible Weathermatic models for a secure, leak-free seal.
  • Self-cleaning ports: Built-in port design helps keep sand and silt from accumulating, reducing clogs and extending valve life.
  • Durable, premium-grade flexible material: Constructed for repeated opening and closing cycles under irrigation conditions.
  • Simple replacement: Service-friendly design lets professionals and DIYers swap the diaphragm quickly without specialty tools.
  • Restores reliable operation: Replacing a faulty diaphragm fixes common issues such as slow valve response, partial opening, or leaking.
  • OEM part number: Sold as Weathermatic part 110-603SA for clear identification and inventory matching.

Use this diaphragm to return your valve to factory-like performance. Before installation, shut off water supply and relieve line pressure. Inspect the valve body and clean seating surfaces and port areas to ensure optimal sealing. Compatible with Nitro, Silver Bullet and Enduro 1" valve assemblies; verify model fit before ordering. Keep the replacement part on hand as a low-cost maintenance item to avoid irrigation downtime.

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Frequently Asked Questions

What valves is this diaphragm compatible with?
Fits 1" Weathermatic Nitro, Silver Bullet and Enduro series valves; verify model size before ordering.
How do I replace the diaphragm safely?
Shut off water, relieve pressure, remove bonnet screws, replace diaphragm, and reassemble. No special tools needed.
Will this diaphragm prevent sand and silt clogs?
Its self-cleaning port design reduces sand and silt buildup, helping maintain valve operation but regular maintenance is recommended.