The best way to clean a tankless water heater is with a flush kit and descaling solution. I included a link to one of those kits below, as well as a link to a YouTube video that will show you. It is not a Rheem video, but its a Rheem unit and its very detailed and simple to understand.
https://www.tanklesswaterheaterdepot.com/tankless-water-heater-descaling-kit
https://youtu.be/St38CFhiaI0
“I like the Rheem tankless water heaters well enough that I currently own five of them. The service from the distributor has been excellent but I have one suggestion: Since the new-style water heaters are so susceptible to brown-outs and power surges, I think it would be a good idea to build surge protectors into the units. Barring that, please recommend to all your customers that they plug their units into a surge protector. I have lost (and replaced) two units due to power surges --- the fuses do not protect the water heaters from power surges.”
“An awesome unit, I cannot say how much money it has saved us versus the standard water heater. Price of unit was around $75 more expensive in local area then my purchase through you guys. Customer service A+ called a few times with water heater questions, answered every time.”
“The tank depot did a great job handling my request. The hot water heater works great. Only issue I have is with install and I am trying to get a plumber to troubleshoot that now. When the gas is shut off to the house, I get no water flow (cold water) this shouldn’t happen... not sure if there is something the installation plumber did, but I assume it’s due to the water heater”
“I thought they were very informative on the product I was interested in buying for my home. Their prices were also very competitive with other companies.”
“Great product and customer service! They were very prompt to ship and process our order and very communicative. This was a great replacement for our hot water tank in our 4 bedroom 2 bath home it works great and is much more efficient.”
“Very good company to work with! Effortless ordering process and excellent follow-up on shipping and delivery. Water heater very straight forward to install an works perfectly. Hot water in seconds and never runs out!”
“We have a very small furnace/ water heater area so this size unit works nicely. Originally I installed a Bosch water star gas unit almost 20 years ago. It did fine until it started leaking last year. I searched for an electric unit as we have had two carbon monoxide alarms from the gas unit in a year. Not realizing that the house demand would require such a larger unit I had to upgrade my electrical panel. I was planning to do this already so it made sense that now was as good a time as any. It does take up to 40 seconds to bring the water up to temp but when it does be prepared. It has the potential to take your skin off. The controls are stupid simple, even I could figure it out. All in all I like the unit and if I get the same life span from it that I got from my Energy start I’ll be happy. Plus the price wasn’t terrible.”
