Pump Module Version 3M
My Own Creation (MOC).
This simple GBC pump module is made of common parts and is an updated version of [https://brickhub.org/i/350](this). This module works at any speed.
Download LDraw File
The instructions here show how to power it using an M motor. See the version powered by an XL motor [https://brickhub.org/i/461](here)