today at a install I go to do the hookup, shut the main water off and cut the copper. The copper is coming out of the slab which is being feed from another area in the house. It is the feed line for the radiant heat. I cut the copper sweat it in and run the main out the house. When I turned the water back on I had hardly any flow at all. Rest of the house is fine but the line feeding me is nothing 28 PSI. checked all valves and all are open. Since the line is in the slab there is no repacing the line. I have no clue. Maybe debris is clogging the line if so How the hell do you get it out????anybody?