Purasan winterizing

Anyone have any experience winterizing a newer Purasan system? The directions clearly state to not use antifreeze so you must drain the tank separately. Wondering if anyone had figured out a good system for pushing/pumping out the contents and being able to collect it. The location of my tank makes it tough. Thanks!

http://raritaneng.com/wp-content/uploads/2016/07/L143v0502-Original-PST-Manual-Pre-2004.pdf

http://raritaneng.com/wp-content/uploads/2016/07/L143v0502-Original-PST-Manual-Pre-2004.pdf

I see winterizing in 1st doc. Hope this helps.

Thanks for the response. I actually have the manual and followed the directions. I'm wondering if anyone has any tricks or tips for making it easier. But thanks for posting.