Hayward SX200K Dome Lid Replacement for S200 & S240 Sand Filters

The Hayward SX200K is a genuine replacement filter dome lid used on select Hayward S200 and S240 series sand filters. This threaded dome-style lid seals the top opening of the filter tank and includes the molded features needed for proper fit and reliable closure.

Key Features

• Part Number: SX200K
• Brand: Hayward
• Type: Sand filter dome lid / closure dome
• Color: Black
• Mounting Style: Threaded (large buttress threads)
• Common Use: Hayward S200 and S240 series sand filters

Approximate Dimensions (For Verification)

• Outside Diameter (at flange): approx. 7-1/2"
• Outside Diameter (at threads): approx. 6"
• Height: approx. 3-5/8"

Common Reasons to Replace

• Cracked dome lid or damaged threads
• Persistent seepage or air entry at the lid area (after confirming O-ring/gasket condition)
• Worn or deformed lid that no longer seats evenly
• Missing lid after service or seasonal storage

Installation Notes

• Confirm your filter model is an S200 or S240 series and compare lid thread style before ordering.
• Clean all sealing surfaces and remove sand/grit before reinstalling the lid.
• Do not overtighten—hand-tighten to a firm seat to avoid warping or thread damage.
• If your system uses a separate O-ring/gasket for the lid, inspect and replace it if flattened or cracked.

Related Products

• Hayward SX200K Dome Lid
• Hayward S200 Sand Filter Parts
• Hayward S240 Sand Filter Parts
• Hayward SX200Z7 Tank O-Ring / Seal
• Hayward SX200Q Threaded Lateral
• Pool-Safe Silicone O-Ring Lubricant

Maintenance Tips

• Keep the lid sealing area clean—sand and debris on sealing surfaces are a common cause of leaks.
• Inspect the lid threads and sealing surfaces during seasonal service.
• Use only pool-safe silicone lubricant on O-rings (if applicable) and avoid petroleum-based products.
• If the lid becomes difficult to seat, check for cross-threading, debris, or a worn seal before forcing it.