C-HWS_Leak.JPG; ZDC-HWS_Pipe.JPG; HWS-Repaired.jpg Jeffrey attached for your reference I. Video showing leaking Supply Line to Garage Heaters from Main Hot Water Supply (HWS) 2. Hole in Supply Line 3. Supply Line 3. Repaired Lines After removing 6 " of concrete and rebar, 4 x 1 1/2" supply lines were uncovered.