Someone send me an email recommending the Polaris 360.

Here is what they had to say, I would appreciate any opinions on it.

The Polaris 360 does not require a dedicated return line, however it
does connect into an existing return line. The other models of Polaris
such as the 180, 280, & 380 require a dedicated return line. As long
as you have a minimum of 1.5HP inground pump and atleast 1 return line
you can operate the Polaris 360. It's a good cleaner especially for
the price.