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Low density polyethylene
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Medium density polyethylene
High density polyethylene
Glass Reinforced Plastic
Single wall construction is land drainage pipe made from one corrugated layer of polypropylene, twin wall construction is pipe made from 2 layers of polypropylene, the external one being corrugated and the internal one being smooth. Twin wall pipe offers superior strength and flow characteristics.
A self contained plant that holds back raw sewage and aerobically breaks down the effluent and solids by the introduction of oxygen, to an environmentally acceptable liquid.
A relatively small holding tank that allows sewage solids to settle and hold back whilst the partially treated liquor runs off to a soak away. This anaerobic process has a byproduct of methane.
Simply a very large holding tank with an inlet only and no outlet. It stores all the foul and grey water discharge for periodic collection by a tanker.
A solution for a property not connected to a public sewer system and not paying rates for their foul water discharge.
The part of a soil volume that is not occupied by soil particles or organic matter. Pore spaces are filled with air, other gases, or water. Large pores allow the ready movement of air and the drainage of water. Large pore spaces permit fast infiltration and percolation of water through a soil or soil horizon.
A tank within a tank. The outer tank contains any leaks or spills that could come from the inner tank containing the hazardous liquid.
A completely self contained fuel dispensing tank. It consists of a bunded tank, a lockable fill and empty point, a pump, a hose, a flow meter and an automatic dispensing nozzle.
Cotterill Civils Blog
Specialists in the supply and installation of drainage materials for over 20 years. Nationwide delivery. © 2013, Cotterill Civils Ltd