Does anyone know where I can find a 1.5" solenoid controlled 3 way valve? I would like to put one after my wood-gun so that when the house isn't calling for heat, it will heat the storage. I found a 1.5" manual 3 way valve, but can't seem to find one with a solenoid. The largest taco 3 way I can find is 1". Is there another way people switch from heating storage to heating he house? How about if your back-up kicks in and you want to avoid heating the storage with that, do you use a 3 way solenoid to bypass the storage as well?