Works well, better priced than other sites

Since the RA121s are being discontinued we tried this one. It was nice and worked with what we needed.

Very smooth and good temperature control. Very happy with purchase

My plumber’s choice. He uses in his home! Good enough for me.

I use a functionally similar unit and for temperature control they work really well. The install of this was pretty straightforward. I did find an error in the text on the installation instructions and once I understood the function it made the whole installation and maintenance of the control very simple. Overall, it’s really a good unit.