Oh its for small bits nothing bigger than 12", must be 12v .
What should I search for when looking for one of those brushes with a hole down the middle?
Oh I must be able to build it for next to nothing!
Do you just want a pump and container? If so, we used a submersible 12v diesel transfer pump and a 25L plastic oil drum with some mesh in it. Worked a treat.
go to your local macro and buy a stainless catering heating trays you can get small holey inserts to fit in them and a lid, bit like these,
cut a corner out of the inner holey insert tray for your brush to pick up the fluid, thats in the bottom tray they are designed to fit together that is what I use for mobile engine building works a treat.
easy to clean and holds about 8-10 ltrs
OH yes and bend the lip around the brush hole up 10-15mm to stop stuff rolling into the hole !