Lancaster Pump offers a broad selection of Survivor 4-inch submersible well pumps. Horsepower ranges from ½ to 5, with the most popular size range — ½ to 1½ — available in corrosion resistant thermoplastic or super strength stainless steel. Capacity ratings are 5, 7, 10, 15 and 22 gallons per minute, with heads as high as 990 feet. A laminated phenolic thrust washer on top of every stage provides down-thrust protection and axial sealing for the impeller inside the next stage above. Lancaster Pump has been in the submersible pump business for over 70 years.