LEGEND 203-237 1-1/4 inch-1-1/2 inch PVC Swing Check Valve Sump Pump

Heavy-Duty 1-1/4" x 1-1/2" PVC Swing Check Valve – Built for Sump and Wastewater Systems

The 1-1/4" x 1-1/2" PVC swing check valve is a critical component for preventing reverse flow in sump pump and wastewater applications. Designed for high-flow environments, this check valve features a weighted flapper and compression end connections for fast, secure installation without the need for solvent welding. Its robust, corrosion-resistant body ensures consistent performance in demanding residential and light commercial systems.

Engineered for Professional Use

Ideal for vertical or horizontal piping runs, this valve supports high-volume discharge lines and protects pumps from short-cycling due to backflow. The durable PVC construction resists corrosion and chemicals commonly found in wastewater and graywater environments. A positive 1/2 lb. cracking pressure enables immediate response when flow initiates, improving pump efficiency and system protection.

Product Highlights

• Size Compatibility: Accommodates 1-1/4" and 1-1/2" SCH 40 or 80 PVC or steel pipe
• Construction: Injection-molded PVC body with EPDM flapper
• Operating Pressure: Rated to 150 PSI
• Temperature Tolerance: Maximum service temperature of 73°F
• Connection Type: Compression-style union ends for quick install/removal
• Length: 5-1/2" overall

Performance Features

• Weighted Flapper: Closes reliably with minimal back pressure
• Positive Cracking Pressure: 0.5 PSI cracking pressure allows for fast response to flow changes
• Versatile Orientation: Can be installed vertically or horizontally without compromising function
• Non-Metallic Body: Fully corrosion-proof for longevity in submersible or damp conditions

Installation Notes

This valve is designed for compression-fit installation on SCH 40 or 80 systems and does not require primer or solvent cement. Installation should be performed by a licensed contractor to ensure full compliance with local code and proper system alignment. For vertical sump pump discharges, place the valve above the pump discharge line, below the horizontal run.

Application Use Cases

• Residential sump pump discharge lines
• Basement drainage systems
• Graywater and wastewater systems
• Light commercial backflow prevention

Specifications Summary

• Size: 1-1/4" to 1-1/2"
• Body Material: PVC
• Seal Material: EPDM
• Max Pressure: 150 PSI
• Temperature: 73°F maximum
• Flapper: Weighted, non-spring loaded
• Country of Origin: U.S.-manufactured

Ensure System Integrity with Trusted Components

This check valve is a smart investment in system reliability—especially in sump or sewage applications where preventing water reversal is essential. Built to perform under pressure and designed for ease of maintenance, it's a go-to solution for contractors looking to reduce callbacks and maximize performance.