GroundRosterChris Cook - C W Cook, INC.Licensed
| Name | Chris Cook - C W Cook, INC. |
| License number | 4487 |
| License type | Water Well Driller, Disinfection, Geothermal Closed-Loop, Geothermal Open-Loop, Pump Controls, Pump Installation, Well Abandonment, Well Deepening, Well Drilling |
| License status | Currently listed — PA DCNR Licensed Water Well Drillers |
| Based in | Sellersville, Pennsylvania 18960 |
| Phone | (267) 424-3715 |
"Based in" is the city on the business's state license record. That can be a mailing address; it doesn't tell you where the business works.
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What this license covers
- Drilling / construction: licensed to bore, case, complete, and plug water wells.
- Pump installation: licensed to install, repair, and replace well pumps, pressure tanks, and the piping between the well and the building.
- Geothermal loops: also licensed to bore the open- or closed-loop wells that serve a ground-source heat pump.
- Cleaning / disinfection: licensed to chlorinate, clean, and redevelop an existing well, the usual response to a bacteria result or a well that has lost yield to buildup.
- Deepening: licensed to deepen an existing well rather than drill a new one, an option when a well runs dry or the water table drops.
- Decommissioning: licensed to seal and abandon a well that is out of service; required in most states, since an open well is a direct path for contamination into the aquifer.
How to verify this license
We publish the license details exactly as they appear in Pennsylvania's official licensing records; we do not vouch for the business itself. Before hiring, look up license #4487 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: PA DCNR - Licensed Water Well Drillers, last checked 2026-08-16. Verify at the official source.
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