Hello! First post here. Brand new pool owner and thankful for finding Trouble Free Pool! Now that I am nearing the end of the swimming season and considering what it's going to take to close my above-ground pool, I'm confused about how to handle the main drain. Part of the confusion is that much information / postings about main drains has to do with in-ground pools.
Here's my setup: 24' diameter 52" deep, above ground, vinyl-liner pool with 2 main drains +/- 5' apart in the center of the pool. The main drain line is flexible PVC (guessing 2") and comes out of the ground at the edge of my pool to a control valve in front of the pump filter basket.
I live in the mountains of west-central PA (+/- 1 hour East of Pittsburgh) and winters are quite cold with snow on the ground generally from Dec through April. Temps close to 0 F would be common.
Question: How should I winterize the main drain line? Should I "air-lock" it? - I don't really see how this works since the water at the bottom of the line would still be above the frost line level. Should I add anti-freeze? (I'm confused on how to add it with water filling most of the line.) Or should I do no more than tie it up vertically above the top of the pool rail and leave the end open for ice expansion? (Found this link for support of the latter: http://www.edwardspools.com/blog/bid...Winterize-Them)