Chad and I did the leak check   on TM2 tube heater (+) water line  with blank off and C-seal  installed on  WB at South Hot Cell.The line was easy to pump down to 0.0xE-9atm.cc/sec and 0.0XE-4 torr on leak detector. Chad flushed lot helium around the water block (10 sec spray). No response had been found on leak detector.