A friend (no, really) asked me this question. She has a D-1 if that makes any difference.
I would like to empty our tub for the summer since we do not use it all season, but the last time I did, I had such a hard time starting it back up again and getting it running. There was so much air in the lines, it took me a long time to get it out...do you know of any special trick for that problem?
Any suggestions?
Phil