My AC water pump crapped out. The marina wanted $500 to repair it telling me the pump was $300 of the expense. So being the do-it-yourselfer, I did some google searching and found the same pump from a pond supplier for $109 shipped. Added a "T" in line at the low point with a valve to drain the water for winter storage. All done AC blowing cold, 1-1/2 hours for $120 with new motor, fittings, SS clamps and heat shrink. $380 left to add to my new Garmin!