I will be installing my Aquarite this weekend and I've read the manual cover to cover. The manufacturer recommends the SWG cell be the last thing the water touches before returning to the pool. While this poses some plumbing challenges for me in my setup, I can do that. However, the manual also says that the cell will not function if the water temperature is too high. They don't specify what "too high" is, but there are occasions where the water returning to my pool is over 100 degrees. I've actually had it north of 140 for several minutes when the solar kicks in on a hot day and the water has been trapped in the panels, but this is really rare and only lasts a few minutes.
In the summer, typical return water temperature is around 92-95 degrees in the mid-afternoon. Will this be too hot for the SWG? Is there any problem plumbing the cell in before the solar valve? When I asked Hayward Pools about plumbing it in before that valve (I didn't ask about the temperature), they said, "We recommend it be the last device in the flow." When I asked why or if there'd be problems putting it before the solar, he simply repeated the exact same sentence verbatim.