As for the softener drain using the PEX 1/2 ID (5/8 OD) it goes up from the softener about 6 feet, but then as you can see in the pictures it doesn't really go down hill the entire way, especially at the end where it goes up the elbow. So would this existing PEX be ok if I maybe just fastened it to the underside of the roof in that corner so that it goes up a couple more feet creating more of a down hill?
What about just tying it into that 1" PVC in the attic that the filter is using and remove the rest of the PEX so that they go down one 1" line across the attic. Any other ideas of how I should salvage this, or should I just remove both drain lines and do exactly as you said Gary.
Please help as I have our first freeze coming in a couple of weeks.