I have a HotSprings hot tub I wanted to shut it down over the winter. However, after looking at videos online on how to do it, I can't find the hole to blow out the water lines. Most of the videos show people just unscrewing a cap on the top edge and moving a piece of plastic upside down etc. I can't find that with mine. When I go to HotSpring's site, it says they can operate year round but no details on how to winterize.
What am I missing? Should I just lower the water temp down to 40 degrees and call it good?