You can drain under the skimmer/return and then blow the lines clean with a shop vac, then got drains either airlock them and/or fill with antifreeze.
You can also plug your skimmer opening and plug your returns so you don't have to drain the water down.
Which is best? Depends on your pool and your area and water replacement cost is probably a factor.
Personally, I don't like water on the sun shelf and uncovered you might lose that much water to evaporation putting the little but there at risk to freezing.
Thanks for the suggestions. I do not think I would sleep at night knowing the plugged pipes were under water. It is just me, but any type of temporary plug in my mind is prone to failure and to have that water trying to get in all winter would keep me up at night wondering if it made it in
Of course antifreeze would give me some peace of mind but it sounds like alot of antifreeze and would still not be as good as the ends of the pipes being out of the water.
Your post did make me realize there is no way I would want water on the shelf just for those reasons. Last winter I had over about 1 foot of ice and I would definitely want to drain at least below tile so this will only leave 6" on the shelf.
So now it is back to if there could be any harmful affects like drying out, cracking, excessive mottling from sun exposure in the winter with 15" to 18" of exposed plaster. We will definitely be closing as late as possible because as noted above we enjoy the view and the waterfall.
Hopefully a few more new englanders will chime in if they have plaster and go without a cover in the winter. I assume any plaster pool will need to be drained below the tile so there would always be some sort of exposure.
@ PoolguyinCT
Just curious if your comments are based on your own pool or your experience in the industry ?
Thanks, Rich..