Hayward Replacement Diaphragm Gasket for Perflex EC65/EC75 Filters — ECX1105 OEM Rubber Seal, Leak Prevention

Hayward ECX1105 is the OEM replacement rubber diaphragm gasket designed to restore sealing and proper function to EC65/EC65A/EC75/EC75A Perflex extended-cycle D.E. pool filters.

Designed for Hayward Perflex filters, the ECX1105 diaphragm gasket forms the critical seal between moving parts inside the filter’s housing to keep backwash and internal flow paths separate. Manufactured to OEM specifications in the United States, this rubber gasket is the part technicians and DIY pool owners use when servicing EC65 and EC75 family units to maintain filtration performance and prevent leaks.

How does replacing this diaphragm gasket affect my filter’s performance?

Worn or damaged diaphragms can allow bypass or leaks that reduce cleaning efficiency and force more frequent maintenance. Installing a fresh diaphragm gasket restores intended flow paths and pressure control inside the Perflex assembly so the filter can maintain longer cycles between cleanings.

• Re-establishes proper sealing to prevent internal bypass
• Helps maintain designed pressure and flow for effective D.E. filtration
• Reduces risk of leaks that can damage components or cause downtime

Will this ECX1105 part fit my pool filter model?

This gasket is specifically made for Hayward EC65, EC65A, EC75, and EC75A Perflex extended-cycle D.E. filters. Always verify the part number and model compatibility before purchasing to ensure a correct fit and avoid installation issues.

• Compatible with EC65 / EC65A and EC75 / EC75A Perflex models
• OEM Hayward part matching factory dimensions and materials
• Works with the Perflex Flex-Tube system when replacing worn seals

What should I consider when installing this replacement gasket?

Installation requires basic filter disassembly and attention to cleanliness and alignment. Inspect mating surfaces for debris or damage, lubricate per Hayward recommendations if applicable, and ensure the gasket seats evenly to prevent pinching or distortion.

• Clean sealing surfaces of dirt, old gasket remnants, and mineral deposits
• Check the gasket for correct orientation and full seating before reassembly
• Tighten fasteners evenly to avoid warping the filter housing or diaphragm

How often might I need to replace the diaphragm gasket?

Replacement frequency depends on use, water chemistry, and exposure to sunlight or chemicals that can harden rubber. Inspect the gasket during routine service intervals and replace it when you find cracks, compressed areas, or persistent leaks.

• Inspect during annual service or whenever disassembling the filter
• Replace if rubber shows cracking, permanent deformation, or loss of elasticity
• Keep spare gaskets on hand for quick field repairs and minimal downtime

Who is this for: Pool owners, service technicians, and maintenance teams using Hayward Perflex EC65 or EC75 filters who need an authentic replacement diaphragm gasket to restore sealing performance. This part suits anyone performing routine filter maintenance or repairing leaks to keep extended-cycle D.E. filtration operating reliably.