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You will have to consult the instructions on your power washer to see if it can take hot water.
Not sure what is going on in vstech's mind but in my state all of the water heaters I have ever seen have a drain valve at the bottom where you parodically are supposed to us it to flush out scale at the bottom of the thank. However, those are natural gas fired water heaters.
I have never seen an electric water heater installed or paid attention to them in the hardware store, so I don't know if they have that bottom valve or not.
Also, the valves on the newer tanks are not as sturdy as the old brass ones. They tend to be of some plastic or if metal the valve stem you turn is plastic. Handle with care.
When I first got my Mercedes it to 3 cans of engine degreaser to get only fairly degreased. I put it up on ramps to do the underside. It did get me far enough to find that the coronach oil leak was the valve cover.
It was so bad that the whole of the transmission from top to bottom was covered with layers or dried oil and dirt. I did not have a pressure washer. Just a regular hose nozzle that had narrow stream.
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84 300D, 82 Volvo 244Gl Diesel
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