About
Dillan Well Drilling Inc. has served the Darlington, Pennsylvania area and surrounding tri-state region since 1919 with geothermal drilling and loopfield installation. The company has completed over 500 residential geothermal loopfields and handles commercial projects from 3-ton to 500-ton vertical systems. Its loopfield installation crews are certified by the International Ground Source Heat Pump Association (IGSHPA) and in heat fusion, with all geothermal boreholes grouted for heat transfer and aquifer protection. Dillan offers turnkey loopfield installation including drilled vertical boreholes, horizontal loopfields, pond loops, piping, excavation, flushing, purging, and antifreeze installation, supported by factory-trained service crews, a large pump service department, and modern air rotary drilling rigs. Verified active operator per dillanwelldrilling.com + igshpa.org strict directory (PA bundle audit 2026-06-01).
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Dillan Well Drilling Inc — Darlington, Pennsylvania
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