Hayward Perflex Gauge Port Adapter - Replacement for Extended-Cycle Filters (D.E. Compatible, OEM Fit)

The Hayward D.E.CX12866 is a direct replacement gauge port adapter designed to restore pressure-gauge access on Perflex extended-cycle pool filters.

If your Hayward Perflex extended-cycle filter has a damaged or missing gauge port adapter, this OEM-compatible replacement re-establishes a secure, leak-free connection for your pressure gauge so you can monitor filter performance. Built to fit multiple Perflex models, the adapter is a simple part that prevents guesswork when assessing backwash needs and overall filtration health.

Which Hayward Perflex models will this adapter fit?

This adapter is engineered to be compatible with both the Perflex extended-cycle basic filters and the D.E. (diatomaceous earth) models. Check your model number against the list below to ensure a proper match before ordering.

• Compatible basic models: EC65A, EC75A, I_PFPPTS, EC50C80X5S
• Compatible D.E. models: EC65, EC65A, EC75, EC75A, EC50A, EC50AC
• OEM-style design for straightforward replacement

How do I install the gauge port adapter?

Installation is straightforward and usually requires only basic hand tools. Remove the old or broken adapter, clean the mounting surface, and thread the replacement in place, taking care to tighten to the filter manufacturer’s recommended torque to avoid leaks.

• Shut off pump and relieve system pressure before starting
• Hand-thread adapter, then snug with a wrench—do not overtighten
• Use compatible thread sealant if your setup recommends it

What are the physical and performance details of this part?

The adapter is a compact, durable component weighing approximately 3.5 pounds and built for continued exposure to pool environments. It provides a stable port for a pressure gauge that helps you track filter loading and determine when maintenance or backwashing is needed.

• Weight: about 3-1/2 pounds for robust fit and handling
• Materials designed to resist pool chemicals and typical wear
• Replaces factory gauge port adapter without modifying the filter housing

Will this replacement prevent leaks and restore accurate pressure readings?

When properly installed, the adapter restores the mechanical interface for your gauge, reducing the likelihood of leaks caused by damaged ports. Accurate pressure readings depend on both a sound adapter and a properly functioning gauge; consider replacing a corroded gauge simultaneously for the most reliable results.

• Restores sealed connection point for pressure gauge
• Helps maintain consistent, readable pressure measurements
• Best used with a serviceable or new pressure gauge for accuracy

Who is this for: Pool owners, service technicians, and maintenance pros working with Hayward Perflex extended-cycle filters who need a dependable, direct-fit replacement for a lost or damaged gauge port adapter. If you manage EC50, EC65 or EC75 series filters and want to maintain clear pressure monitoring without replacing the entire filter head, this part is a practical, cost-effective option.