Check valves open and close to push and pull liquid through the pump. If abrasive solids get into the pump, the check valve may get clogged, and stop pushing/pulling. Sometimes you can clear the blockage by just pushing water through the pump, but if the check valve is damaged, you'll need to replace them.

This kit uses materials specifically for the G70, Flojet's pump for flammable or aggressive liquids. The G70 has also found a home in many distilleries because it is groundable, ATeX rated, and all internal parts have good compatibility with alcohol.

• 4 × Check Valves, composed of Nylon, Viton Extreme, & Hastelloy