Hello Francis, we aren't sure. We are Eccotemp Systems and not Rheem, but you can purchase service valves on our website if you're interested. We also do bundles of the EZ Flush kits that come with service valves. If you have further questions or would like to learn more about our units, feel free to reach out to us on our support page: support.eccotemp.com. We have all the manuals available online so that you can see the installation requirements. We also have a "product selector" that helps you determine what is right for you and your needs. You can chat with our live tech support, find tutorials, real videos from real customers and all sorts of DIY's you can do to help live a more energy efficient life. Thank you,
Yes, I used it full strength and it worked great. A plumber told me about using white vinegar; you just have to let it recirculate longer than the commercial Solutions...atleast for 90 mins.
yes as long as you have service valves it is basically a self contained pump and motor should work on all tank-less heaters they also recommend it other things to