Harry Caswell IncLicensed

Licensed well and septic professional based in Millsboro, Sussex County, DE

"Based in" is the city and county of the address on the business's 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.
• Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
• Pumping / cleaning: licensed to pump out and clean septic tanks, service them, and haul the waste.

How to verify this license

We publish the license details exactly as they appear in the official licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up license #5427, 790, 6299F, 6292F directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Source: Delaware DNREC - licensed water well and pump installer contractors + Delaware DNREC - licensed on-site wastewater treatment and disposal system licensees, last checked 2026-08-16. Verify at the official source.

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