Abstract: A filter constructed of sections of plastic pipe reinforced by plastic bands glued to the pipe to increase the wall thickness at strategic locations and increase the surface area adjacent seals between the canister components. An encircling steel ring cooperates with a shoulder provided by one band for clamping three seals with one clamp. A second similar ring and band clamps a fourth seal. All seal clamps are of steel construction and are not exposed to corrosive fluid entering the filter. Commercially available stainless steel Helicoil thread inserts are utilized in holes through plastic material to afford greater strength and longevity for the filter.