The Tsunami AT1 uses a powerhead or pump to keep a constant level in a sump. When the water level in the sump drops 1", the AT1 will turn on the reservoir pump and turn it off after the sump fills up 1".

Features:

• Prevents main pump from running dry.
• Holds sump levels constant.
• Reduces salinity fluctuations.
• Includes water level sensor.
• Circuitry designed to UL specifications.