Hayward SPX1491B O-Ring - #129

What This Part Is Used For
The Hayward SPX1491B is an O-ring used to seal a compatible Hayward pool system connection or serviceable joint. It sits in a groove between two mating surfaces to stop water leaks and air suction leaks. This is a common wear item that gets replaced during routine service.

Why This Part Matters
A flattened or cracked O-ring is a fast way to end up with drips, weeping unions, or air getting pulled into the system. Air leaks can cause pump priming issues and unstable filter pressure. Replacing the correct size seal restores a tight system without over-tightening fittings.

Key Features and Specifications

• Manufacturer part number SPX1491B
• O-ring - #129
• Sealing gasket for compatible Hayward assemblies
• Helps prevent water leaks and suction-side air leaks
• Service replacement wear item

Installation and Fitment Guidance
Clean the sealing groove and mating surfaces before installing. Lightly lubricate with an approved pool O-ring lubricant if needed and do not over-tighten. Confirm by manufacturer part number before ordering.

About the Hayward Brand
Hayward supports complete residential pool systems with pumps, filters, heaters, automation, cleaners, chlorination, and the service parts that keep them running. Their equipment is built around serviceable seals and unions so common leak points can be repaired quickly. Using the correct Hayward replacement parts helps maintain proper fit and consistent performance. That matters when multiple components - pump, filter, heater, and valves - are working together on one pad.

Common Service Context
Techs typically replace this O-ring when a union starts dripping or the pump shows signs of pulling air. It also gets swapped during filter cleanings or pad re-plumbs when connections are disturbed.