You are talking about the throttle body? The simplest system is to have no water lines going to the throttle body at all. Block off any small water pipes you have.
Otherwise you have the option of hooking up the small water lines to the throttle body correctly.
If you have to use a old hose on a corroded fitting, use a bit of liquid silicon. Or use new rubber hoses, and sand any corrosion of the metal fittings.