sure glad i stumbled upon this site last night, lots of good info. I have a wood boiler with 80 feet of 1 inch pex running to a coil in a forced air furnace. My question is; i want to branch off from the furnace and run lines to the garage. My local guy says to T the line and add another pump but i think that this will cause problems as my main pump is in supply side. Should i T or just have one pump push through 2 coils. the garage is about 50 ft away. Also, should i downsize the garage line to 3/4 to keep the flow up? thanx for the help