All, I have a problem, I think. I have a 50 gallon Ruudglas Pacemaker water heater and yesterday I replaced about 3 feet of copper piping coming out on the hot side of the water heater up to a 90 degree elbow…I had a leak at the elbow. I turned off the heaters and drained the water heater before doing this. After all was said and done, I am now not getting much hot water at all. How do I check the thermostats and elements to see if I somehow screwed these up. Please, the more detailed instructions, the better. Thanks.