Bevan and I did a helium pressure test on TM4 HS water circuit at CS. The leak detector is pumped to the bottom scale(E-9 atm.cc/sec and E-4torr). We applied 70 psi helium to the HS circuit for 3 minutes .  No response had been found. I also leak checked IG1 flange which was replaced yesterday. It is  good. We connected the TM4 to CS and put the HV cover on. The water cooling system will be started soon.