[Dmatz]

They sell tapered hose plugs at west marine for use in pluging through hull hoses while making repairs or changing parts. If you had to replace them they would be help full. On my bus the used ball valves in place if the gate or globe valves that sounds like they are using. You could get Ball valves female thread and male thread hose adapters 2 hose clamps in opposite directions on each end, should be good for the next 100,000 miles.

Good question about the life of the hoses used in this application. I have never heard of anyone needed to replace the hoses for an aquahot. From any service center or on the blogs. It would be a very difficult and timely process if one had to do this. Engine coolant hoses do not last forever. They are vertically not installed with replacement in mind.