I'll start with pictures:
This is our very old water heater, has worked great for us, can't imagine how much this puppy is costing us for electricity each month, but would it be possible to hook up a wtw hx on this baby. These are the only hookups on it, the cold water is on the bottom with the drain and the hot water comes out the side with the T & P valve. Is it worth it to try or do I break down and get a new one, and if so how would I go about hooking up a HXer to a on demand heater?
Anybody guess what the year is on this thing?