A 12 V diaphragm pressure pump for an ATV sprayer or other 12 V water system. A pressure switch stops the pump when the outlet closes and starts it again when it opens.
It has a Santoprene diaphragm and EPDM check valves with stainless springs, and it's self-priming, so it can be mounted above the tank. A thermal overload cuts the motor if it gets too hot and resets itself. It's built for intermittent duty, and running it dry isn't recommended.
