If the plumbing from my house going to the current softener is 3/4" (I assume I can use some sort of adapter to go from 3/4" home plumbing to 1" 5810 inlet), will I get the benefits of the higher flow, or is the 3/4" home plumbing a bottleneck? Or am I misunderstanding your description of the "high flow bypass" - does the higher flow rate only apply when the equipment is in bypass mode?
The 5800/10/12 seems to be a model that Fleck has not made available for direct-to-consumer sales, will I have problems getting parts for this model if I need them?
Edit: attached are some pictures of the garage (excuse the mess, please).
1. Half-bath in question. Pedestal sink (with visible plumbing I had not previously noticed until really looking at it). Toilet plumbing is under floor / in wall I guess.
2. I included this crappy pic because I realized I didn't have a good way to illustrate where the half-bath was - it is to the imediate right of where I am standing to take this pic.
3. Looking back towards the door I was standing in for picture 2 above. The half-bath is directly behind the white plastic shelves. The home's first floor, floor level is the top of the stairs (alternately, the bottom of the garage drywall). So the toilet in the half-bath is sitting at about the height of the red rake handle.
4. Crappy panoramic of the rear wall of the garage. Plumbing a drain line around the perimiter of the garage would be a PITA - behind the lumber shelves, through the divider wall and water heater closet, into the nook behind the toolbox, around the outcropping behind the workbench, around the stairs and over the door, over the river and though the woods...
Can I run a drain line straight up the wall by the softener into the attic and straight back down the other side to the bath plumbing? The attic space above the garage is totally open and easy access, but it is high - the garage has 13ft ceilings. Can the water softener pump the drain water up 8 or 10 feet?