When it rains, are you kept up all night by the clunking of your sump pump check valve. There is a solution. The Pro Series Klunkless Check Valve. The Klunkless Check Valve has a large silencing air chamber that absorbs the downward force of the water after the pump stops, reducing the loud clunk when the flapper closes. Now, you will not be awakened on rainy nights by a clunking noise every time the sump pump stops.

• Silencing air chamber absorbs the sound that normally occurs after the sump pump shutoff
• Reduces the loud clunking sound when the sump pump stops
• Valve installs easily on both 1 and 1 pipes with no gluing required
• Stainless steel hose clamps included
• For ground water use only
• 1-year warranty