AMTHKNO GX22425 GX22426 Deck Wash Water Port Plate Kit Compatible with John D-eere X400 X500 X700 - Include Coupler GX22425, Fitting GX22426, Screw 37M7089

What It Is

This is a deck wash water port plate kit that lets you connect a garden hose directly to your mower deck for cleaning. Designed for John Deere X300, X500, and X700 series lawn tractors, it replaces the factory port assembly so you can flush grass clippings and debris from under the deck without removing it.

Fitment & Compatibility

• Models: Fits John Deere X300, X400, X500, X700 series (e.g., X304, X360, X534, X738). Also compatible with select 1023E/1025R sub-compact tractors with 54” or 60” decks.
• OEM Cross-Reference: Replaces John Deere parts GX22425 (coupler), GX22426 (fitting), and screw 37M7089. Verify your deck model uses this specific three-piece assembly—some newer decks use a single-piece port.
• What to Check: Measure the existing port hole diameter (typically 1-1/2”) and thread pitch. Ensure your deck has a flat mounting surface for the plate. The kit includes a plastic coupler, brass fitting, and screw—no gasket included, so reuse or buy one separately.
• Aftermarket Note: AMTHKNO is a third-party brand. Fitment is generally accurate, but slight variations in plastic molding can occur. If you need exact OEM color or texture, stick with John Deere parts.

Key Things to Know

• Quality: The brass fitting is durable; the plastic coupler feels lighter than OEM but holds up under normal use. Some users report the coupler cracks if over-tightened.
• Installation: Easy—remove the old port, clean the deck surface, apply thread sealant (not included) to the fitting, and hand-tighten. No special tools needed.
• Gotcha: The screw (37M7089) is a self-tapping type. If your deck hole is stripped, you may need to drill and tap a new thread. Also, the kit lacks a washer or gasket—use RTV silicone or a rubber washer to prevent leaks.
• Maintenance: Disconnect the hose after washing to avoid water sitting in the port, which can freeze and crack the plastic in winter.

Should You Buy It

If you own a compatible John Deere X-series mower and your factory port is broken or missing, this kit is a solid value at $12. It’s a simple, functional fix for deck washing—just plan to add thread sealant or a gasket. Not for decks with a different port design or if you want OEM-grade durability.