Any Brake-bleeding Pump
Liquidlust1,
Mr. Bulge is exactly right! The MityVacII, which I use (and also bought at Auto Zone for under $25 U.S.), is a vacuum brake-bleeding kit. The catch-cup (provided with kit) is to catch the brake fluid, so that it does not enter the pump. That same cup can catch the excess warm water from your cylinder while hydro pumping your penis. I like the MityVacII (plastic) because it is light weight and durable.
Technically, any pump can be retrofitted with a catch-cup in the line between cylinder and pump to make a hydro pump. You can wet pump or dry pump with that set-up without changing anything except whether you use water or not. Try it both ways and see what works best for you.
Good luck!
bigjack
I won’t be content until I’ve earned the name!