| Sono
As for shutting it down for the winter, I guess that's the price us northsman we have to pay (spring refits). If you were able to fill your system with a bio-antifreeze and start it up weekly, it would probably last a bit longer. Maybe a 12V timer to run for a couple hours a week. It maybe less $$ for a new pump with all the time ane efforts, but for a live-aboard an accumulator is the way to go.
As for the manufacturer, they want you to buy a new one every year (capitalism).
Alan, the small hole in the lines, if at the far end away from the pump, is actually using the lines and system as a mini accumulator by expansion and contraction of the lines. We do this with compressors on the paint rigs. A 100 foot of hose/piping can be used as a holding tank for short term blasts.
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