Thanks for the info. Back to my geothermal installation, I think the system is coming along well. The 3 well loops (1.25" pipe) were all attached together via 1.5" pipe with T connectors and brought through basement wall. The lines were then routed up (2 90 degree joints) in wall to the drop ceiling area and then routed to the pumps (via some long connecting pipes & 3 more 90 degree joints), then split via connectors to both of the pump things mounted on the wall to feed each system. I think with a little more careful planning up front, they could have avoided 2 of the 90 degree bends. I mentioned that I wished it'd had not needed those last 2 bends (if they'd brought over the lines 3-4 more feet in drop ceiling, they could have avoided the additional bends), and the installer said he's had installs with "many more 90 degree turns than I have" and those systems worked great so he doesn't think I'll have any issues. They finish the tie-in today, start fill up tomorrow with the rest of the HVAC crew, and tomorrow starts the rest of the system installations. I hope they'll finish by Friday COB, but it will be tight now, I think.