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In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass through. In oil refineries, traps are used to prevent hydrocarbons and other dangerous gases and chemical fumes from escaping through drains.
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Piping and instrumentation diagram of pump with storage tank. Symbols according to EN ISO 10628 and EN 62424. A more complex example of a P&ID. A piping and instrumentation diagram (P&ID) is defined as follows: A diagram which shows the interconnection of process equipment and the instrumentation used to control the process.
Usually, each floor drain is connected to a trap, to prevent sewer gases from escaping into indoors spaces. A floor sink is a type of floor drain primarily used as an indirect waste receptor. It is generally deeper than a standard floor drain and can have a full or partial grate, or no grate as required to accommodate the indirect waste pipes.
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Grease trap for greywater in Lima, Peru. A grease trap (also known as grease interceptor, grease recovery device, grease capsule and grease converter) is a plumbing device (a type of trap) designed to intercept most greases and solids before they enter a wastewater disposal system.
Before installing a check dam, engineers inspect the site. Standard practices call for the drainage area to be ten acres or less. [3] [9] The waterway should be on a slope of no more than 50% and should have a minimum depth to bedrock of 2 ft (0.61 m). [14] Check dams are often used in natural or constructed channels or swales.
Cone section (black), base section (below the cone section), and stacks of grade adjustment rings of various sizes stored at a manufacturing plant. The purpose of the cone section is to reduce the openings from large chamber sizes to small cover sizes. In a masonry manhole, the bricks form a corbel inward to reduce the opening to a desired size ...