You might be searching for a pump that operates on 12 V this could be the best choice for your project.

This is a tiny 12V DC2-position 3-way Small Mini Electric Solenoid Valve for Gas Air/Pump Gas Release Exhaust Discouraged Solenoid Exhaust Valve. Control gas flow in and out with this small Gas valve which operates on12V dc.

How it Works :

1. This valve act as closed (blocked flow) when not powered.
2. When you apply a 5V power supply to the input, the valve gets open and the flow-through valve get started.
3. Removing the supply voltage again blocks the flow.
4. This is a two-way valve which means it can flow in both directions.

Working Modes :

1. When powered on, 1 and 2 are connected, 3 and 1,2 are not connected.
2. When power is off, 1 and 3 are connected, 2 and 1, 3 are not connected.

Specifications:

Package Includes:

1 x FA0520F 12V DC 2-position 3-way Small Mini Electric Solenoid Valve for Air / Gas