The Apollo Welders completed the welding of the EndX H1 HEPI fluid circulation system last week and pressured the system over the weekend.  The pressure held over the weekend so we deemed the system tight, actually more than 5 days.  A couple photos attached and a link to a resource space collection of more photos.

ResourceSpace link: https://ligoimages.mit.edu/?r=19113
If you go to my LHO_HEPI collection you'll see more