Hayward ECX4000C Clamp Assembly with Hardware for Perflex® Extended-Cycle D.E. Filters
The Hayward ECX4000C is an OEM clamp assembly with hardware used to secure the filter head (top) to the tank body on compatible Hayward Perflex extended-cycle D.E. filters. If your clamp is cracked, warped, stripped, or won’t tighten evenly, replacing the clamp helps restore a secure seal and safer, more reliable filter operation.
Fits / Compatibility
- Hayward Perflex extended-cycle D.E. filter models including: EC30, EC40, EC40AC, and EC40C90 series
- Also commonly referenced for Perflex extended-cycle filter model group I_PFPPTS
What’s Included
- Clamp assembly (band)
- Hardware for tightening and securing the clamp (commonly includes bolts/nuts and related hardware)
What It Fixes
- Clamp is cracked, split, sun-brittle, or missing hardware
- Filter head won’t seat evenly or clamp won’t hold tension
- Seepage at the tank/head seam caused by uneven clamping (after confirming the tank O-ring is in good shape)
Specs (Quick Reference)
- Part Number: ECX4000C
- Part Type: Filter Parts (Clamp Assy w/ Hardware)
- Pool Type: In-Ground
- GTIN/UPC: 610377748650
- Replacement Part Warranty: 6 months (parts only)
- Approx. Shipping Weight: 3.7 lb
Installation Notes
- Turn off the pump and relieve filter pressure before loosening any clamp.
- Clean the clamp seat area and sealing surfaces so the head sits squarely.
- Tighten evenly—uneven tension can pinch the O-ring and cause leaks.
- If you are servicing the clamp, inspect the tank O-ring and replace it if flattened, stretched, or nicked.
Related Products
- Hayward ECX4000C (search)
- Hayward Perflex EC40AC Filter Parts (search)
- Hayward Perflex EC50AC Filter Parts (search)
- Hayward ECX5000G Diaphragm Gasket (search)
- Hayward ECX1322A Vent Valve (search)
- D.E. Filter Powder (search)
Maintenance Tips
- Always depressurize the filter before opening—never loosen a clamp under pressure.
- Keep the clamp band and sealing surfaces clean; grit can prevent even clamping and cause leaks.
- Lightly lubricate large O-rings with silicone-based pool lubricant to reduce pinching and improve sealing.
- If leaks persist after replacing the clamp, inspect the head and tank flange for warping or cracks.
