Because the entire property only has 100 Amperes (80A main floor, 50A upstairs), the upstairs suite cannot handle the on-demand water heater I had planned … yet. As well, there is no room in this small suite for a water heater of any decent size. (I have a 6-gallon, but for two people it should be minimum 15-gallon.)
So, they will share the main floor hot water tank. To do this, they need a flow monitor to measure how much hot water they use and pay the tenant downstairs.
The work begins. These valves are for the upstairs.





























