Caltric Deck Wash Water Port Plate Compatible with John Deere S160 S170 S180 S220 S240 SST18 X105

What It Is

This is a replacement water port plate for the deck wash system on select John Deere lawn tractors. It mounts to the top of the mower deck and connects a garden hose to flush grass clippings from the underside after mowing.

Fitment & Compatibility

• Fits John Deere models: S160, S170, S180, S220, S240, SST18, X105. Also fits some older LX and LA series decks (check your deck part number).
• OEM equivalent: Replaces John Deere part numbers GY20970, GY20971, GY20970A, and GY20971A.
• What to verify before buying:
  • Measure the hole diameter on your deck – the plate requires a 1-1/8” (28.5mm) hole.
  • Confirm your deck has a flat mounting surface (not curved or ribbed where the plate sits).
  • Check that the existing port is not stripped or cracked – if so, this plate won’t seal.
• Deck size note: Fits 42” to 54” decks on listed models, but the port location varies. Look for a round plastic cap or plug on the deck top.

Key Things to Know

• Quality: Caltric is an aftermarket brand; the plate is plastic with a rubber gasket. Typically fits well but the gasket may be slightly thinner than OEM – use thread sealant on the screws for a leak-free seal.
• Installation difficulty: Easy (15 minutes). Remove the old plug or broken plate, clean the hole, insert the new plate, and tighten the two screws from underneath. No special tools needed.
• Common gotcha: If the deck has debris or rust around the hole, the gasket won’t seal – scrape clean first. Also, the included screws are self-tapping; don’t overtighten or they’ll strip the plastic.
• Compatibility trap: This plate will not fit decks with a factory-installed wash port that uses a bayonet-style fitting (e.g., some newer X300 series). Check your deck’s original port shape.

Should You Buy It

Yes, if you have one of the listed John Deere models and your original deck wash port is broken, missing, or leaking. At $17, it’s a cheap fix that restores easy deck cleaning. Skip it if your deck hole is damaged or if you need a full wash port kit (hose adapter included).