hokiecjb97
New Member
Just installed a Rinnai RU180i that has circ-logic, but requires an external pump. I can’t find the pump that works with this unit and one that will work with a crossover valve as I don’t have a dedicated return. They offer a GTK03 and GTK15, but neither seem to say they are compatible and neither mention cross-over (comfort valves). Any recommendations? I put the old recirc pump in the circuit, but it doesn’t drive enough flow to kick the unit on.