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A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.
Sanitary manholes should be constructed at locations where there is a change from a simple straight sewer line. These include all junctions that combine multiple lines into one or split from one, bends, changing in elevation, changing in pipe size, and changing in pipe type.
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.
A split pin (UK usage) / cotter pin (UK/USA usage) holding a rod in place with a washer. A split pin, also known as a cotter pin, or cotter key in the US, [1] is a metal fastener with two tines that are bent during installation, similar to a staple or rivet.
This photo shows the anchor chain running through a ship's hawsepipe. Hawsepiper is an informal maritime industry term used to refer to a merchant ship's officer who began his or her career as an unlicensed merchant seaman and did not attend a traditional maritime college or academy to earn an officer's license.
The uilleann pipes (/ ˈ ɪ l ə n / ⓘ IL-ən or / ˈ ɪ l j ə n / IL-yən, Irish: [ˈɪl̠ʲən̪ˠ]), also known as Union pipes and sometimes called Irish pipes, ...
A methamphetamine pipe is a glass pipe which consists of a tube connected to a spherical bulb with a small opening on top designed for smoking methamphetamine. A pipe that has been used will have carbon deposit on the exterior of the bulb and white or gray crystal residues on the inner surface. [ 1 ]