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AQUA KING™ II Junior Fresh Water Pump 12 VDC 2.0 GPM

SHURFLO®’s AQUA KING™ II Junior Fresh Water Pump's design was created with unique over-molded single-piece diaphragm, assuring long life and top performance in all plumbing systems. These fresh water automatic demand pumps are quiet and can run dry without damage. Sealed switch. Ignition protected. Thermally protected. 1/2" hose barb fittings are included (aftermarket models only).


California residents: see Proposition 65 information

Installation & Operation


Data Sheet / Replacement Parts

pds 4128-110-X04.pdf


AQUA KING™ II Junior Fresh Water Pump 12 VDC 2.0 GPM

Model Numbers OEM/Aftermarket

4128-110-A04, 4128-110-E04


12 VDC

Dimensions Inches/Millimeters

8.2" X 4.9" X 4.1" [208 X 124 X 104mm]

Flow Rate GPM/LPM

2.0 GPM [7.6 LPM]

Amps (Max.)


Shut-Off Pressure

30 PSI [2.0 BAR]

2901 Replacement
Sealed Switch
Sealed Motor
Corrosion Resistant Electro Coated Motor
4 Independent Chambers
Built-In Check Valve
Co-Molded Diaphragm
Adjustable Switch
Self-Priming up to 6 Feet
Dry Run Capability
Thermally Protected
Ignition Protected, CE
Model Number 4128-110-A04

OEM 2.0 GPM [7.6 LPM]

Model Number 4128-110-E04

Aftermarket 2.0 GPM [7.6 LPM]

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