Stiebel Eltron SHC 10

This under sink HWS is great for a short time. Unfortunately it has an enamel coated steel tank which relies on a small anode for protection. If the unit is in heavy use, the anode will probably need replacing within 2 years. Cost of anode at trade price is about $45. Replacing the anode is another matter as it is in the most difficult to get at st^pid place. Had a plumber in to look at how to replace the anode by pulling apart a unit that had been replaced because of a leaking tank (4 year old). We realized that we would need to make up a special tool to pass the anode through the element opening and then raise the locating thread to enter the locating hole on the top of the tank further towards the back of the tank. No we were not trying to repair this unit - the tank was already gone. We just wanted to see whether anode replacement was economical in another unit. We agreed that the cost of replacing the anode on the second under sink unit I have would be too expensive to justify. The warranty on the unit is void if the anode is not serviced every 2 years. THIS IS A THROW AWAY UNIT. All future under sink units I buy will be stainless tanks that don't require an anode. First pic shows tank with front plastic surround and underlying insulating foam removed. Heater element is large screw at front. Second pic shows bolt of anode at the top of the tank towards the back.