Rheem Tankless flush and descale with single handle service valve set 

@cfldriven - My setup is similar to this, but I have a filter in front of the cold water input. So in order to clean the unit, I assume I would turn off the cold supply before the filter. Then turn the second cold valve like in your photo to the closed position, connect the hose to the service port and the pump. Then on the hot side, close that valve, then connect the second hose to the service port, and then place it in the bucket. Then turn on the pump and flush. Is that correct? Thanks for the video!

Since there is no secondary isolation valve, will water squirt out when you remove the service caps?

One more thing, the heater is rated for 4.6 gpm, so the descaler pump should be equivalent or better, correct?

Thanks

So, it's not that different from descaling a Cleveland Steamer Boiler, aside from the inlet filter, and using vinegar rather than descaling fluid! Thanks for an informative video!