Installation of hot water recirculating loop
I am planning to install a hot water recirculation loop on my existing system to facilitate a frequent high demand for hot water in our kitchen. My house is on a slab. I am planning to run a 1/2" pex line into the attic and then back down into the closet where the hw tank resides. The run in the attic will be about 30 feet and I plan to insulate. I plan to install a grundfos recirculation pump with thermostatic control and to use motion sensors to trigger the circuit to run the pump only during times of demand. My biggest concern is running the loop overhead in the attic. Will I be ok doing this? Also, would appreciate any input on electrical systems to trigger pump in response to motion sensors in baths and kitchen during times of use/demand. Thanks!