Aladdin O-429-0 Hayward Filter Tank O-Ring | DEX2400K

Key Benefits + Hayward Filter Compatibility

• Replacement tank O-ring for compatible Hayward pool filters using OEM part DEX2400K.
• Aladdin part O-429-0 is listed for Hayward ProGrid, Micro-Clear, SwimClear, and Super Star-Clear filter applications.
• Large 19-7/16 in. inside diameter with a 1/2 in. cross section for the specified filter tank sealing application.
• Helps restore the seal between compatible filter tank sections when the original O-ring is flattened, cracked, stretched, or damaged.
• Matching the OEM number and filter family before ordering helps reduce fitment mistakes.

Quick Product Summary

The Aladdin O-429-0 is a replacement filter tank O-ring for compatible Hayward filtration equipment using OEM part DEX2400K. Aladdin lists O-429 for Hayward C3000 and C4000 Micro-Clear vertical fiberglass tanks, ProGrid filter applications, and Super Star-Clear applications, while pool-parts references also list compatible SwimClear filters. Published dimensions are approximately 19-7/16 inches inside diameter with a 1/2-inch cross section. Before ordering, verify your filter model and the original DEX2400K or O-429 part number.

Best For

• Hayward filter service using DEX2400K
• Compatible ProGrid D.E. filter tank sealing
• Compatible Micro-Clear vertical grid D.E. filters
• Compatible SwimClear and Super Star-Clear cartridge filter applications
• Replacing a worn or damaged large filter tank O-ring

Why This Matters

• The filter tank O-ring seals the joint between compatible filter tank sections.
• A flattened, cracked, stretched, or damaged O-ring can prevent the tank from sealing correctly.
• Correct dimensions and part-number matching are important because similar filter O-rings are not interchangeable.
• Replacing a compromised tank seal during service can help prevent leakage after reassembly.

Common Signs You Need This / Use This When

• The existing filter tank O-ring is cracked, flattened, stretched, brittle, or damaged.
• The tank joint leaks after the clamp and sealing surfaces have been correctly inspected.
• Your filter documentation calls for Hayward DEX2400K.
• Your existing replacement number is Aladdin O-429 or O-429-0.

Product Specifications

Compatibility / Fitment Notes

Aladdin cross-references O-429 to Hayward DEX2400K and lists C3000 and C4000 Micro-Clear vertical fiberglass tank, ProGrid, and Super Star-Clear applications. Additional pool-parts references list O-429 for compatible SwimClear filters. Verify the exact filter model and original O-ring or OEM number before ordering. Do not select a replacement tank O-ring by appearance alone.

Installation / Use Notes

Shut the circulation system off and fully relieve filter pressure before opening the filter. Follow the filter manufacturer's service instructions. Remove the old O-ring, clean the O-ring groove and sealing surfaces, inspect them for damage, and install the replacement without twisting or pinching it. Use only lubricant approved for the filter seal if lubrication is called for by the manufacturer. Reassemble the filter and verify the tank joint is properly secured before restarting the system.

Buy with Confidence

Benchmark Pool Supply helps homeowners and pool professionals identify replacement filter parts by manufacturer number, OEM cross-reference, dimensions, and equipment family. For Aladdin O-429-0, matching Hayward DEX2400K and your exact filter model before ordering is the best way to reduce fitment mistakes.