12V Submersible Pump Operating Instructions


  • The 12V Pump Controller can get warm. It is set to turn off at 65ºC.
  • Do not block the fan intake or exhaust vent during operation of the 12V Pump Controller.
  • Do not touch the inside of the 12V Submersible Pump after it has been running – the motor module gets extremely hot.
  • This 12V Submersible Pump is to only be used for groundwater purging/sampling.
  • The 12V Pump Controller is water resistant but not waterproof. Do not submerge in water.
  • Do not use the 12V Pump Controller near flammable liquids or gases.
  • The 12V Submersible Pump is designed to operate when submerged only.
  • The Solinst Model 415 12V Controller is only designed to work with the Solinst Model 415 12V Submersible Pump.


12V Submersible Pump Power Supply

The 12V Pump Controller operates from an external 12 volt DC power supply such as a car, truck or marine 12 volt battery that can supply up to 45 amps at maximum draw. The Pump Controller has a 2.3 m (7.5 ft) power cable with connector clips for direct battery connection.

The power cable clips are oversized for use with automotive batteries. The red clip connects to the positive (+) battery terminal, black to negative (-) battery terminal. If the battery is connected with reverse polarity the Controller will not be harmed, but it will NOT operate until the polarity is connected correctly (the LED on the Pump Controller will remain off with reverse polarity).

A circuit breaker reset button is located on the side of the Pump Controller. In the event the amperage exceeds 50 amps, the circuit breaker will trip (button pops out) and turn the Controller off. To reset the breaker, turn the dial to "0" then press the reset button back in to regain operation.

If the Pump is to be powered by a typical 45Ah vehicle battery, start the vehicle and run for 15 minutes to recharge the battery, then restart the vehicle every 15 minutes for 5 minutes to maintain the battery power during sampling.


12V Submersible Pump Operation

  • Connect the negative (black) battery clip to the negative terminal post on a 12 volt DC battery and the positive (red) battery clip to the positive terminal.
  • Connect the Pump's cable to the connector cable from the Pump Controller.
  • Connect the 3/8" ID tubing to the Pump. Ensure the tubing is pushed all the way onto the tubing barb.
  • Lower the Pump to the required sampling depth. Use a safety line connected to the eyebolt on the top of the Pump, if desired (such as a Model 103 Tag Line).
  • Turn the dial to adjust the flow as desired.
  • illustration shows solinst 415 12V submersible pump connected to 12v battery setup with sampling beaker


    Maximum Flow Rate Estimates
    Depth to Water Flow Rate
    30 ft (10 m) 12.5 L/min
    40 ft (12 m) 11.0 L/min
    50 ft (15 m) 9.5 L/min
    70 ft (21 m) 7.5 L/min
    80 ft (24 m) 6.0 L/min
    100 ft (30 m) 4.25 L/min
    110 ft (33.5 m) 1.5 L/min

    Note: See Model 415 12V Submersible Pump data sheet for full pump curve.


    Tubing Specifications
    1/2" OD x 3/8" ID LDPE (100 ft coil) 109490
    1/2" OD x 3/8" ID LDPE (250 ft coil) 109489
    1/2" OD x 3/8" ID LDPE (500 ft coil) 109488