Hayward DEX2421JKIT Clamp System Kit (Clamp, Seal, Hardware & Labels) for SwimClear® & Pro-Grid® Filters
The Hayward DEX2421JKIT is an OEM tank clamp system kit used to secure the upper and lower tank halves on select Hayward filters. This kit restores a tight, even clamping force around the tank seam and includes the key sealing and hardware components needed for a reliable, leak-resistant connection.
Fits / Compatibility
- Hayward SwimClear cartridge filters: C2030, C3030, C4030, C5030, C7030
- Hayward Pro-Grid vertical grid D.E. filters: DE2420, DE3620, DE4820, DE6020
- Hayward DEP 500 series: DEP60, DEP80, DEP100
- Commonly referenced for newer style clamp systems (often listed for units manufactured after certain model-year revisions—verify by parts diagram)
What’s Included
- Clamp ring
- Metal-reinforced tank seal (tank O-ring/seal)
- Clamp nut & bolt / tightening hardware
- Labels (kit labeling)
- Hang tag / kit documentation (as supplied)
Common Reasons to Replace
- Clamp ring is cracked, stretched, rusted, or won’t tighten evenly
- Persistent leaking at the tank seam due to a worn or damaged seal
- Filter was opened for service and the seal no longer reseats reliably
- Preventive refresh on an older filter to improve safety and sealing
Specs (Quick Reference)
- Part Number: DEX2421JKIT
- Part Type: Filter Parts (Clamp System Kit)
- Pool Type: In-Ground
- GTIN/UPC: 610377105972
- Approx. Shipping Weight: 10 lb
- Approx. Shipping Dimensions: 2.5″ x 22″ x 24″
- Replacement Part Warranty: 6 months (parts only)
Installation Notes
- Shut off the pump and fully relieve filter pressure at the air relief before loosening the clamp.
- Clean the tank flange and sealing surfaces thoroughly—grit and old debris are common causes of seam leaks.
- Seat the metal-reinforced seal evenly and tighten the clamp uniformly per the filter’s instructions.
- After restart, bleed air until a steady stream of water flows, then inspect the seam for seepage.
- Never attempt to tighten or remove a clamp while the filter is under pressure.
Related Products
- Hayward DEX2421JKIT (search)
- Hayward Pro-Grid DE2420 Parts (search)
- Hayward Pro-Grid DE4820 Parts (search)
- Hayward Pro-Grid DE6020 Parts (search)
- Hayward SwimClear C5030 Parts (search)
- Hayward DEP100 Parts (search)
- Silicone O-Ring & Gasket Lubricant (search)
Maintenance Tips
- Inspect the clamp and seal every time you open the filter—replace any seal that is flattened, nicked, or stiff.
- Lightly lubricate the tank seal with silicone-based pool lubricant to reduce pinching and improve resealing.
- Keep the clamp band and tank flange clean; debris under the seal is a common cause of seam leaks.
- If the seam seeps after service, depressurize, re-seat the seal evenly, and retighten the clamp uniformly (don’t overtighten).
