Quiet Spring Loaded Sump Pump Check Valve With Flapper For Backflow Prevention Keeps Your System Quiet 1-1/2 Inch Pipe Includes Four Stainless Steel Clamps Reduces Water Hammer And Extends Sump Pump Life

Quiet Spring-Loaded Check Valve for 1-1/2 In Sump Pumps
✔️ 1-1/2 in schedule 40 pipe, spring-loaded flapper, 4 stainless clamps

This quiet check valve is designed to prevent backflow and dampen water hammer in sump pump systems. It’s ideal for basements, laundry rooms, and other spaces where noise matters, and it fits standard 1-1/2" piping for easy retrofit.

✅ Fits 1-1/2" NPT flow rate for straightforward installation
✅ Spring-loaded flapper reduces water hammer and operation noise
✅ Transparent valve body lets you observe flow and detect obstructions
✅ Includes four stainless steel clamps and two NBR couplings for secure fit
✅ Corrosion-resistant clamps and rubber couplings for long life

Dimension	Inches	Millimeters
Overall size	8.5 x 3 x 3	215.9 x 76.2 x 76.2
Inner diameter	1.89	48.0
Outer diameter	2.28	57.9
Rubber joint thickness	0.19	4.8

💡 What is a sump pump check valve and why should I use a spring-loaded version?

A handy upgrade for backflow protection and quiet operation. - It prevents backflow into the sump basin, protecting the pump and extending life. - It reduces water hammer and noise for a calmer basement environment. - The transparent body makes flow checks quick and damage from blockages easy to spot. - It’s designed for quick install on 1-1/2" piping with included clamps and couplings.