Ideal for high-volume water removal, the RL-SC50T features heavy-duty cast iron construction with an energy efficient motor. Water is coming back into pit from discharge pipe After pump has run, inspect to see if water is coming back into pit through the sump pump. If so, check valve has failed. Volute (bottom of pump) is cracked allowing water to leak out Inspect bottom section of pump for cracks or holes that would allow water ot escape.
Float switch is out of adjustment Check if pump shuts off before float ball is all the way down. If it’s shutting down too early, adjust float switch per instructions in owners’ manual. The primary pump is a top suction and cast iron 1/2 HP pump with vertical float switch for automatic operation, while the battery back-up pump is a high-flow, corrosion-resistant sump pump with reliable reed float switch and battery box with charger. Inspect to see if check valve is stuck closed.