Living in the Past
SILVER Star
For the flange I would use two large pipe wrenches. But would wait unit your torch at home and the a extra female sweat to male threaded elbow just case you damage that one. As for the auto bleed don't remember ever seeing any you could take a apart and clean. Most are crimped together. Seen some large auto bleeds for commercial boils that bolted together. Almost everything I worked was chilled water. Large system would have a ball valve to remove them. Can't see why there code against it on heat water. Most commercial building here use eletric strip heat. Home either natural gas furnace or heat pump. Our cabin has a electric furnace. I have a heat pump with back up strip heat to install. I plan to play around to figure the temperature the heat because worthless in the winter.No natural gas available and with the wood stove can't see going propane. With the size of the cabin and the layout I can load it in the evening and it only be in the mid sixties when we get up. But only when the temperature are no lower than the twenties.