CVCLD Practice Questions - NGWA Certified Vertical Closed Loop Driller Exam

Which pipe material is specified by NGWA guidelines and IGSHPA standards as the primary piping for vertical closed-loop ground heat exchangers?

High-density polyethylene (HDPE) SDR-11 Schedule 80 PVC Copper Type K Galvanized steel pipe

High-density polyethylene (HDPE) SDR-11

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