We recently purchased a Entegra Accolade 37k. During the walk through we were told that we had an inline water heater. Needless to say that is not the case. I noticed the burner going on recently without any demand for hot water. We actually have a Dometic WH-10GEA. We did not receive a user manual but were finally able to locate on line with a lot of difficulty. It is a 10 Gallon Gas/electric water heater. I was able to locate the drain plug and pressure valve with no issue. It’s the same as our previous RV. I am unable to locate the switch to turn it on electric instead of gas. The only on/off we can locate is the firefly system hot water heater and it has no electric or gas designation. We like to run our hot water heater on electric when we have shore power to save on propane. Second question, it did not have a rod in it for corrosion just a plug. Should we use a rod or is it not necessary with this model. Anyone that may have experience with this, info and guidance would be much appreciated. Thanks all!