Subsurface water drainage system

Claim 1

A drainage system directing water to a drainpipe, a catch basin or an outlet pipe, comprising: at least one fabric inlet tube having a discharge end; a self-sustaining, rectangular water-porous inlet support disposed in said at least one fabric inlet tube, an end of said support extending generally up to said discharge end of said inlet tube; said support being composed of a substantially rigid plastic sheet including a regularly spaced array of alternating elevations and depressions, so as to define spaces between alternating elevations and spaces between alternating depressions; said fabric tube extending over said spaces so as to be generally flat in shape, but being deformable to fit into at least some of said spaces; and an outlet fluidly connecting said discharge end of at least one inlet tube and said drainpipe, catch basin or outlet pipe; wherein said outlet includes at least one generally flat open end including a rectangular opening dimensioned to compressively receive and retain said discharge end of said inlet tube and said end of said support therein, one of said outlet and said support being stiff but slightly resilient; wherein said open end of said outlet includes an outwardly flared portion facilitating insertion of said fabric tube discharge end and said support end into said outlet open end; and wherein said outlet includes a plurality of inwardly depending projections, located interiorly of said rectangular opening, said projections being dimensioned so as to deform said fabric tube upon insertion so as to fit said fabric tube into said at least some of said spaces of said support and trap said fabric tube between said support and said outlet.