The hot water bypass valves (the top three valves). This is with the bypass OFF (in other words, water and anti-freeze would go into the hot water tank in this configuration). Photo © copyright by Sarah Marino and Ron Coscorrosa.
The hot water bypass valves (the top three valves). This is with the bypass OFF (in other words, water and anti-freeze would go into the hot water tank in this configuration). Photo © copyright by Sarah Marino and Ron Coscorrosa.