Anyone know of a link to a piping diagram showing two tanks in series and allowing you to isolate each tank?
I believe you would pipe like so, but I'd like an 'official' diagram to show my plumber.
X is a valve that's shut , O one that is open.
I'd Imagine its a big no-no to have both valves shut to a tank unless its energy source is off and its drained or BOOM.
Question: If you were taking Tank #1 off-line would you just close the cold inlet valve and leave the hot open for additional safety and to drain the tank as hot water was used?