using a 12 volt wiper fluid pump for ballast system

[Trafficlightguy]

I need to make this reversible, I was wonder if hey sell a module for this or do I need to do this with a relay.
any suggestion or ideas
I am new to this and committed to build my WTC.
thanks for the help

[JHapprich]

Morning, could you post a picture? Have you considered a gear pump with an esc or an electric switch?

[Surcouf]

After seeing these units discussed on the Dive Tribe meetings, I have used the 25 amp Escape 32 ESC from Aloft Hobbies for my geared water pump (brushed) and propulsion motor (brushless) in 2 models. They are small (12mm x 25mm without wiring), and easy to program if you buy their wi-fi link. The programming lets you setup for brushed operation, and you just wire in 2 of the 3 leads. Both my models are using a 70mm WTC, so they fit really well. They are also relatively inexpensive.

Simpler than wiring in switches, and takes less room in your dry compartment.