Might I suggest 1 thing. Plug your water pump and compressor into an appropriately sized power strip. When you power up the strip your water pump will immediately run and begin to circulate coolant, when ready start your compressor and fill your gun or bottle. When you're done you can stop your compressor but the water pump will continue cooling until you turn off the power strip. You will never forget to start your water pump this way.

Upvote 0