Aladdin Hayward NorthStar & EasyClear Lid O-Ring | CX400G | O-504

The Aladdin O-504 Lid O-Ring provides a reliable replacement for the Hayward CX400G seal used on NorthStar pump lids and EasyClear cartridge filters. Made from chemical-resistant rubber, it maintains elasticity under chlorine exposure and pressure changes, helping prevent air intrusion and water leakage that can disrupt prime and system performance. Following the OEM-style CX400G contour, the O-504 seats smoothly in the lid groove, ensuring secure closure during servicing or seasonal maintenance. With its accurate fit and long-lasting sealing integrity, it supports consistent pressure and efficient hydraulic flow in compatible pump and filtration systems.

Highlights

• CX400G-Equivalent Fit: Designed to replicate Hayward’s original CX400G lid seal dimensions for dependable use on NorthStar and EasyClear systems.

• Protects System Prime: Forms a watertight, airtight seal that helps prevent suction leaks and pressure loss during operation.

• Resilient Elastomer Material: Withstands chlorine, temperature shifts, and repeated compression cycles while maintaining sealing strength.

• Simple Installation: Seats naturally into the lid channel for quick, uniform placement during maintenance.

• Improves Overall Flow: Helps maintain steady pressure and filtration efficiency by eliminating leaks that affect hydraulic performance.

Compatibility

• Hayward NorthStar Pumps
• Hayward EasyClear Filters

Additional Info

The Aladdin O-504 Lid O-Ring replaces the Hayward CX400G seal used for NorthStar pump lids and EasyClear cartridge filter tops. This FAQ assists SOSPool.com customers by explaining compatibility, installation steps, and what to expect when ordering online. These details help ensure the O-504 restores a secure, leak-free seal that supports optimal system performance.

Compatibility Checks for Online Orders

Online customers often want to confirm the correct Hayward lid seal before placing an order.

How can I verify the O-504 fits my Hayward equipment before ordering?

Check your lid for the CX400G marking or confirm your system is a NorthStar pump or EasyClear filter. If so, the O-504 is the correct replacement. Comparing product photos can also help.

Does the O-504 work across multiple NorthStar and EasyClear versions?

Yes, the lid-groove dimensions are standardized across these models. The O-504 fits securely and maintains reliable sealing pressure in all compatible units.

Will replacing this O-ring help with air leaks or pressure issues?

Yes, a worn lid seal commonly causes air intrusion or unstable pressure. The O-504 restores a tight barrier to support steady priming and filtration.

Installation and Setup After Delivery

This section provides guidance for installing the O-504 once you receive your order.

How do I install the O-504 on my pump or filter lid?

Clean the groove, seat the O-ring evenly, and apply a small amount of silicone-based lubricant. Reinstall the lid and tighten until fully sealed.

What should I check after installing the new O-ring?

Monitor the pump and filter for stable pressure, quick priming, and absence of moisture around the lid. These signs confirm correct sealing.

How long does the O-504 typically last under normal use?

The elastomer material resists chlorine, compression set, and heat, allowing long service life. Periodic inspection during routine maintenance is recommended.

Shipping, Delivery, and Online Support

SOSPool.com customers often want to understand delivery timelines and proper part inspection.

How quickly does the O-504 ship after ordering?

Most orders ship promptly, and checkout provides accurate delivery estimates. Tracking updates let you monitor the shipment as it moves through transit.

What should I inspect when the O-ring arrives?

Ensure the O-ring is smooth, flexible, undamaged, and properly shaped. Comparing it to product images helps confirm readiness for installation.

Should I order any additional parts with the O-504?

Many online customers add clamp O-rings, filter cartridges, or union gaskets to complete their maintenance project in one shipment.