Sump pumps require what device installed on their discharges to prevent backflow?

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Multiple Choice

Sump pumps require what device installed on their discharges to prevent backflow?

Explanation:
Preventing backflow in a sump discharge relies on one-way flow. A check valve is installed on the discharge line so water can only move away from the sump. When the pump stops or pressure pushes back, the valve closes, keeping water from flowing back into the pit and basement. A backwater valve is used on sewer lines to stop wastewater from backing up into the building, which is a different situation than a sump discharge. A float switch controls when the pump turns on and off, not backflow. A union is just a connection fitting and does not prevent backflow.

Preventing backflow in a sump discharge relies on one-way flow. A check valve is installed on the discharge line so water can only move away from the sump. When the pump stops or pressure pushes back, the valve closes, keeping water from flowing back into the pit and basement.

A backwater valve is used on sewer lines to stop wastewater from backing up into the building, which is a different situation than a sump discharge. A float switch controls when the pump turns on and off, not backflow. A union is just a connection fitting and does not prevent backflow.

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