Sub-soil drainage piping.

摘要

@ A sub-soil drainage pipe segment (12) comprises a first round cylindrical portion (14) forming a socket (16) and a second round cylindrical portion (18) integral with and extending from the first portion (14), the inside diameter of the first portion (14) being substantially equal to the outside diameter of the second portion (18), in the second portion (18) there are a plurality of circumferentially spaced, longitudinally extending slots (22). The slots (22) are defined by longitudinally extending side walls (24) which diverge from the outside inwardly. A plain end (20) of the second portion (18) forms a spigot which is receivable in the socket (16) of a similar segment, so that a number of such segments can be interconnected end-to-end to form a sub-soil drainage line.