Reliable check valve operation is critical to protecting pool equipment from damaging backflow. The Swimables Corrosion-Resistant Check Valve Flapper for Pentair (SW-32-042) is a direct-fit replacement designed to restore proper one-way water flow in Pentair-style check valves used on pool and spa systems.

When a check valve flapper becomes warped, brittle, or corroded, water can flow backward through the system—placing unnecessary strain on pumps, heaters, chlorinators, and salt systems. This replacement flapper is engineered from corrosion-resistant materials specifically suited for harsh pool environments, including saltwater and high-chlorine systems.

Manufactured to OEM-equivalent dimensions, the Swimables SW-32-042 installs easily and restores dependable backflow prevention without replacing the entire valve body.

Restores Proper One-Way Flow Protection

The check valve flapper is the core sealing component that allows water to move in one direction while blocking reverse flow. A worn or damaged flapper can allow backflow when the pump shuts off, potentially draining heaters, flooding equipment, or causing air intrusion.

Replacing the flapper restores proper sealing and helps maintain stable system pressure and equipment protection.

Designed for Pentair-Style Check Valves

The SW-32-042 is designed to fit Pentair check valve housings commonly used on residential pool and spa plumbing. Precise sizing ensures smooth operation, full closure, and consistent response as water flow changes.

This targeted replacement helps extend the life of the existing valve assembly while maintaining OEM-style performance.

Corrosion-Resistant for Saltwater & Chemical Exposure

Standard rubber flappers can deteriorate quickly in aggressive pool environments. This corrosion-resistant design is built to withstand:

• Saltwater chlorination systems

• High sanitizer concentrations

• Continuous moisture exposure

The result is longer service life and fewer replacements over time.

Why Replacing a Check Valve Flapper Matters

A failing flapper can cause serious equipment issues if ignored.

• Prevents damaging backflow into pumps and heaters

• Protects chlorinators and salt systems from reverse flow

• Maintains prime and system pressure after pump shutdown

• Extends the service life of existing check valves

Product Specifications

Buy with Confidence from Benchmark Pool Supply

When you purchase the Swimables Corrosion-Resistant Check Valve Flapper for Pentair (SW-32-042) from Benchmark Pool Supply, you’re buying from a pool supply team that understands real-world equipment failures and proper repairs.

Benchmark Pool Supply stocks proven replacement parts, supports professional installations, and helps keep your pool equipment protected and running reliably.