Thanks for the input. Two follow-ups:

1. Where would I insert the shop-vac, into the skimmer? Do I need some sort of adapter for the vacuum hose? If so, will it have enough power to push the water back up the pipes from the basement up to the return lines? It probably has to travel 4 or 5 feet up, and then approximately another 10 feet or so horizontally to the actual return line exits.

2. Why would I have to disconnect the filter and pump if they are out of the weather? I can easily drain both. Disconnecting looks like a major hassle...especially for the pump.

Thanks!

Quote Originally Posted by CarlD View Post
Welcome!
I'm not the expert on winterizing pools with underground lines. Generally, though, I'm guessing it would be best if you could fill your underground lines with pool anti-freeze and plug them, disconnecting your pump and filter for the winter, and, perhaps, storing your cartridge in a cleaning bath, since it's in your basement already. You should be able to blow out the lines with a shop vac, rather than a compressor as vacs generally pack more volume and less pressure.

But...I'll let those who know better correct me.