I posted some time back about rust clogging my orifice in my furnace. I am not traveling anymore so today I abandoned the steel lines and ran 1/2" copper tubing. I ty waped it to the steel lines. Did find rust and fluid in the lines. Most of this was where the tee was for the furnace. I added a drip leg at the end of the line which goes to hot water heater and stove. This area is close to axles so clearance not problem. I was concerned about a drip leg at furnace tee. Could hang on something. Once get on my property, about 10 miles away, may add one. be easy to do. I am surprised how tired I got doing this.