Culvert and "Big-O" Tile drain are also available at Sprucedale Agromart.  10' and 20' lengths of 16 gauge metal culvert are sold in common diameters of 8" to 48". We also carry couplers for those long projects and have a select mixture of elbows and joining boxes.  Plastic pipe, commonly Known as "BIG-O" tile drain is available in 4" or 6" diameters.  This piping can be perforated or solid, as well as supplied with a filter sock. We also have "Hydro Tile" which is "centre strung" with a rope cord for easy use when fishing cable or other contents through the pipe.