New Open Loop Geo Install

[VAWellDriller]

I am building a new house and am installing an open loop geo HVAC system, and have a supply and return well. The HVAC contractor normally does closed loop systems, and has that sub install all the plumbing right up to the units inside. I'm really not sure why, but he doesn't want to do any plumbing, and wants me to handle the water connections to the unit. I'm a well driller by trade, so a little plumbing doesn't scare me, just wondering if there is a preferred material to use, and why? I'm not very good with copper, and I have CPVC plumbing for the rest of the house. I was just going to continue with the CPVC for the HVAC unless there is something I'm missing. The water temp (entering and leaving) should never be out of the 45 - 75 degree F range I don't think.

 

[Texas Wellman]

Updates?

 

[Sponsor]

 

[VAWellDriller]

I ran 1" CPVC and it turned out looking and working just fine. House isn't done yet but we've got the heat on. I will get a pic when I can.

 

[Texas Wellman]

I actually just installed two pumps for two different geo systems last week. I started digging through some of the documentation and it stated to NOT use PVC pipe due to some kind of oil used in the freon system that was incompatible with PVC. I guess if there was a coil leak it would leak the oil into the water side and the oil could cause the pipe to fail. It's probably CYA type stuff that will never happen but I thought of it when I came across this thread.