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

The Aladdin O-504 Lid O-Ring is a precision-molded seal crafted to match the original Hayward CX400G dimensions used on NorthStar pumps and EasyClear cartridge filter lids. Its chemical-resistant elastomer maintains flexibility under pressure, heat, and daily filtration cycles, forming a uniform barrier that helps prevent suction-side air leaks and water seepage. By following the original Hayward sealing profile, the O-504 seats securely into the lid groove for reliable closure during routine maintenance. Designed for durable performance, it helps maintain system pressure, protect prime, and support stable hydraulic flow across compatible pump and filter systems.

Highlights

• Matches CX400G Specs: Molded to align with the original Hayward CX400G lid seal used on NorthStar pumps and EasyClear cartridge filters.

• Prevents Air and Water Leaks: Creates a consistent sealing surface that protects prime, maintains pressure, and supports smooth system operation.

• Durable Rubber Construction: Chemical-resistant elastomer withstands chlorine, heat, and repeated compression without losing sealing strength.

• Easy Groove Seating: Fits cleanly into the lid channel, allowing quick replacement and dependable sealing during regular service.

• Supports Filtration Efficiency: Helps maintain stable suction and pressure, promoting optimal pump and filter performance.

Compatibility

• Hayward NorthStar Pumps
• Hayward EasyClear Filters

Additional Info

The Aladdin O-504 Lid O-Ring is engineered to replace the Hayward CX400G seal used on NorthStar pump lids and EasyClear cartridge filters. This FAQ helps Wholesale Pool Mart customers compare local pricing, check nearby stock, and prepare for service work involving lid-seal failures. These details ensure the O-504 supports leak-free, consistent hydraulic performance.

Compatibility and Fitment Details

Service professionals often verify exact seal numbers before performing filter or pump maintenance.

Is the O-504 the correct replacement for the CX400G lid seal?

Yes, the O-504 is molded to match the OEM CX400G dimensions used on NorthStar pumps and EasyClear filters. If your equipment references CX400G, this is the correct O-ring.

Will the O-504 fit consistently across different versions of these Hayward systems?

Yes, Hayward standardized the lid-groove dimensions for these models, so the O-504 maintains uniform compression across all compatible units.

Can a new O-504 improve filtration consistency?

Yes, a proper lid seal prevents air intrusion and pressure instability. Installing the O-504 helps restore steady hydraulic performance and optimal circulation.

Installation, Maintenance, and Service Preparation

Wholesale Pool Mart customers often gather all required parts ahead of multi-system service visits.

How should the O-504 be installed during service?

Clean the lid groove thoroughly, position the O-ring evenly, and apply a thin silicone lubricant. Tighten the lid until the seal is fully compressed for best performance.

What issues arise when the CX400G seal is worn?

Symptoms include air bubbles in the pump basket, filter pressure fluctuations, and water seepage around the lid. Replacing the seal typically resolves these issues quickly.

How do technicians confirm the seal is functioning correctly?

Stable pressure readings and a pump that primes without hesitation indicate a proper seal. Moisture-free operation around the lid is another positive sign.

Local Pricing, Stock, and Service Coordination

Service professionals and DIY customers often check multiple Wholesale Pool Mart locations before starting maintenance.

Is the O-504 usually in stock across nearby Wholesale Pool Mart stores?

Yes, the O-504 is commonly stocked due to frequent lid-seal replacement needs. Checking local pricing helps plan for bulk or multi-system service calls.

What should I have ready when calling for availability?

Provide your equipment model or the CX400G reference number. A photo of your lid can help staff confirm the correct part.

Do technicians often purchase other seals alongside the O-504?

Yes, many also pick up clamp O-rings, union gaskets, or filter cartridges to complete system refurbishment in one visit.