Dual cylinder water well filter and method of using the same

Abstract

The invention is a water well filter. An outer pipe is concentric with an inner pipe. Each pipe has a plurality of water passage apertures. The outer pipe is shorter than the inner pipe, but long enough to cover the apertures of the inner pipe. The outer pipe is attached to non-apertured portions of the inner pipe by sealing rings disposed at an upper and lower end of the upper pipe so as to form a gap between the pipes. The sealing rings are welded onto the inner and outer pipes. A granulated filter material fills the gap. The filter granules may be bonded to each other as well as to the surfaces of the pipes. A nylon mesh cover is disposed on the outer surface of the inner pipe to prevent filter granules from entering through the inner pipe apertures. The inner pipe has an internally threaded portion at one end and an externally threaded portion at the other end so as to allow multiple inner pipes, and thus multiple water well filters, to be attached end to end. The outer pipe, inner pipe, sealing rings, and granulated filter material all comprise unplasticized polyvinyl chloride. The invention also comprises a method for filtering out particulate matter from water in a well.