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Highway French drain under construction Coarse washed stone base in place Filter fabric over pipe A wye joining a perforated and a solid corrugated pipe to a buried solid outlet. Ditches are dug manually or by a trencher. An inclination of 1 in 100 to 1 in 200 is typical.
A piece of Sunday stone in the Natural History Museum, London "Sunday stone" is an artificial stone composed of calcium carbonate that formed on the walls of drainage pipes in some coal mines. [1] [2] It is striped due to the differing levels of coal dust produced during the day and night shifts. [1]
A drain cover is a cover with holes (e.g. a manhole) or a grating used to cover a drain, to prevent unwanted entry of foreign objects, or injury to people or animals. It allows drainage of liquids but prevents entry from large solid objects, and thus acts as a coarse filter. A sink drain cover is a drain cover used to cover the sink drain.
Many modern land drains are created utilising rigid or flexible plastic pipes pierced with holes, laid in pea gravel. (The pea gravel is pea-sized pebbles without sharp points to damage the pipe.) Geotextile material can surround the gravel to keep out silt. This can be installed in an excavated trench.
Percolation Trench. A percolation trench, also called an infiltration trench, is a type of best management practice (BMP) that is used to manage stormwater runoff, prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay.
Plastic supply pipes have become increasingly common, with a variety of materials and fittings employed. PVC/CPVC – rigid plastic pipes similar to PVC drain pipes but with thicker walls to deal with municipal water pressure, introduced around 1970. PVC stands for polyvinyl chloride, and it has become a common replacement for metal piping.