Looking for some guidance on plumbing. Currently heat pump is plumbed with the connections for my gas heater valved and waiting. What I would like to do is be able to close off one or the other or both heaters. As learned on TFP, gas early and late season with heat pump mid (in Central PA). Is it worth not running salt water through the heater not in use or ? Just looking for best longevity for my heaters. If someone could provide the correct way to plumb these, I would appreciate it!
Thanks - Ted