Hayward ECX1642A Tank Bolt Set (Stainless Steel) for Perflex® Extended-Cycle D.E. & Select Hayward Sand Filters
The Hayward ECX1642A is an OEM tank/head bolt set used to clamp and secure the tank/head assembly on compatible Hayward filters. If your existing hardware is rusted, stripped, missing, or no longer tightens evenly, replacing the bolt set helps restore a secure, leak-resistant seal and safer filter operation.
Fits / Compatibility
- Hayward Perflex Extended-Cycle D.E. filters: EC65, EC65A, EC75, EC75A
- Also commonly listed for select Hayward sand filter applications including S160T, S200, and S240 (verify your parts diagram)
- Pool Type: In-Ground
What’s Included
- (1) 1/4″-20 hex head bolt (commonly 1-3/4″ length)
- (1) hex nut
- (2) flat washers
Note: This SKU is typically sold as one bolt set (one bolt + hardware). Your filter may use multiple bolts around the tank/head—order the quantity needed for your model.
Common Reasons to Replace
- Rust/corrosion on existing hardware
- Stripped threads or rounded hardware
- Uneven clamp tension that contributes to seepage at the tank seal (after verifying the main O-ring is good)
- Missing hardware discovered during service
Installation Notes
- Turn off the pump and relieve filter pressure before loosening any tank hardware.
- Tighten hardware evenly in small increments to help the head seat squarely and avoid pinching the main seal.
- If you’re servicing the tank/head joint, inspect the main tank O-ring and replace it if flattened, stretched, or nicked.
- Do not overtighten—over-torque can crack plastic components or distort seals.
Specs (Quick Reference)
- Part Number: ECX1642A
- Part Type: Filter Parts (Tank/Head Bolt Set)
- Material: Stainless steel (bolt set)
Related Products
- Hayward ECX1642A Tank Bolt Set (search)
- Hayward Perflex EC65 / EC65A Parts (search)
- Hayward Perflex EC75 / EC75A Parts (search)
- Hayward S200 Sand Filter Parts (search)
- Hayward Perflex Tank O-Rings (search)
- Silicone O-Ring & Gasket Lubricant (search)
Maintenance Tips
- Always depressurize the filter before opening—never loosen tank hardware under pressure.
- Keep sealing surfaces clean; grit and old D.E. can prevent even seating and cause seepage.
- Lightly lubricate large O-rings with silicone-based pool lubricant to reduce pinching and improve sealing.
- If leaks persist after tightening, inspect the tank/head for warping or cracks and replace worn seals as needed.
