The red numbers hand written match the cat numbers in the valve body and the instructions with the valve. The #1 port from TV2 goes to the suction side of C1 pump. Maybe the recirc line I plumbed at the outlet of C1 pump is confusing you? This acts as the cross the between the two headers. This is a more accurate illustration on how I intend to plumb it. Also recall thst my individual zones do not have zone valves and my pumps are on the cold return side of the zone pumping into the boiler inlet. The only thing I believe I should add is a valve in the recirc line to throttle the flow so it's not bypassing the zones.