weeping tile
n.— «Key components to this portion of the project, besides the 6 x 6 lumber, are a perforated four-inch drain pipe (also referred to as weeping tile), course gravel, 10-inch galvanized spikes, a 1/4 inch ship auger and a five-pound mallet.» —“Time to place timbers” by Chris Emard Standard Freeholder (Cornwall, Ontario, Canada) July 12, 2008. (source: Double-Tongued Dictionary)