Aquatec - 550 Series Variable Speed Delivery / Demand Pump Model:4.5 GPM / 50 PSI Pressure / 120 Volt Install it in the fourth

Install it in the fourth stage position where the carbon post filter normally sits

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Aquatec - 550 Series Variable Speed Delivery / Demand Pump Model:4.5 GPM / 50 PSI Pressure / 120 Volt Install it in the fourthThe Aquatec 550 Series Pumps can self prime water from a holding tank and pressurize it or boost pressure from a low pressure source. These pumps are made to operate intermittently but can run for several hours at a time. It can be operated in delivery mode by an external power switch or demand mode with an integrated pressure switch. Specifications : up to 6 GPM 1 2" Quick Disconnect (Fittings Not Included) 5 chamber construction Closed impervious