Thanks so much. I have located the the hot water bypass valve next to the kitchen sink as per your advice. I had looked in that compartment before but had not stuck my head in there far enough to see it where it is somewhat recessed to the far right. I had already located the fresh water drain which has an “open close” valve under the drivers side couch. Also the water pump is there, but again no valves, gate or otherwise on that, and no tube for rv antifreeze. I’m thinking the po must have just used compressed air to clear the lines, put the any rv antifreeze in the drains. I also found the gate valves for the line drains in the little compartment next to the grey and black water drains as you indicated. Again, thanks so much for your excellent advice.
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