O-240 | Aladdin Filter Head/Volute/Seal Plate O-Ring

The Aladdin O-240 O-Ring provides a precise, durable seal for filter heads, volutes, seal plates, and pump housings across a wide range of pool and spa equipment models. With an inner diameter of roughly 10" and a robust ¼" cross-section, this O-ring is built to form a tight, water- and pressure-resistant seal between joined parts — preventing leaks and maintaining stable internal pressure during circulation. Its chemical-resistant rubber construction stands up to regular exposure to chlorinated or saltwater pools, while its universal compatibility makes it a go-to replacement part for equipment from major manufacturers including Hayward, Pentair (Ultra-Flow, Sta-Rite, Aqua-Flo), and related pump and filter systems. Easy to install and ideal for regular maintenance, the O-240 restores seal integrity and helps extend the life of existing pool hardware.

Highlights

• Universal Fit for Heads & Volutes: Compatible with heads, seal plates, and volute housings from popular pool and spa equipment lines.

• Exact 10" ID / ¼" Thickness: Matches original manufacturer dimensions for proper seating and reliable seal performance.

• Chemical-Resistant Build: Resists chlorine, salt, and other pool chemicals — stays flexible and leak-proof over time.

• Prevents Leaks & Pressure Loss: Ensures tight sealing under pressure to maintain filtration efficiency and avoid water loss.

• Affordable Maintenance Solution: A cost-effective way to reseal existing equipment housings instead of replacing expensive parts or assemblies.

Compatibility

• StarClear
• Dura-Glas
• Max-E-Pro
• Maxi-Glas
• Swimquip

Replacement for OEM Part Numbers

• CX900F
• 39006000
• 92200180
• 320-110
• 31-358
• U9-228A
• 35505-0422
• O-1082

Additional Info

The Aladdin O-240 O-Ring is designed for pump housings, filter heads, volutes, and seal plates that use a 10-inch inner diameter and ¼-inch cross-section. This section helps Discount Pool Mart customers confirm compatibility, understand common leak symptoms, and prepare for proper installation before picking up the part in store. These FAQs focus on restoring sealing integrity and reducing equipment downtime.

Compatibility and Fitment

Customers often visit the store with photos or old parts to ensure the O-240 matches their pump or filter housing.

How do I confirm the O-240 fits my pump or filter assembly?

If your equipment uses a 10-inch ID O-ring for the head, volute, or seal plate, the O-240 is typically the correct match. Many Hayward, Pentair, and related systems use this universal profile, and bringing your old seal to Discount Pool Mart helps verify fitment.

Does the O-240 replace seals on older Hayward or Pentair systems?

Yes, many legacy pumps and filters use this common dimension. If your original O-ring shows the same 10-inch inner diameter and thick cross-section, this replacement usually fits.

Can this O-ring resolve pressure drops around the pump or filter seal?

Often yes. A worn O-ring allows air and water seepage, which reduces system pressure. Installing the O-240 restores a proper watertight barrier.

Installation and Troubleshooting

These questions address leak detection, seating problems, and prep steps before replacement.

What should I clean before installing the O-240?

Wipe the housing groove, remove scale or debris, and inspect for cracks. A clean surface ensures even compression once the clamp or bolts are tightened.

Why is water appearing around the clamp after replacing the O-ring?

This may indicate uneven tightening or a twisted O-ring. Resetting the gasket and tightening the clamp uniformly usually resolves the issue.

How can I check if the new seal is performing correctly?

The system should prime smoothly, hold pressure, and show no signs of moisture around the housing after a few minutes of circulation.

Local Pickup and Store Guidance

These answers help walk-in customers prepare before visiting Discount Pool Mart.

Should I bring my old O-ring to the store?

Yes, most customers bring the worn seal or a picture of the housing to confirm exact compatibility quickly.

Is the O-240 normally stocked for same-day pickup?

It is stocked regularly, but calling ahead ensures immediate availability at your preferred location.

Do customers often buy other items when resealing equipment?

Yes, many pick up silicone lubricant, replacement clamp bands, or new lid O-rings while servicing their pump or filter assembly.