Swing Check Valve is designed to control air pressure, liquid and gas to flow in the same direction. This is to prevent these substance to reverse into the air pump and it will not damage. If Swing Check Valve damages, this substance will reverse back and forth which possibly damages or shorten its life of the air pump. It is recommended to change Swing Check Valve once a year. Furthermore, it will secure the air pump or prolong its life if replace Swing Check Valve and Diaphragm Set at the same time.
Swing Check Valve