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2. Pigging - Wikipedia

   en.wikipedia.org/wiki/Pigging

   A cleaning pig for a 150-millimetre (6 in) oil pipeline. The wire brush encircles the shaft and scours the interior of the pipeline. In pipeline transportation, pigging is the practice of using pipeline inspection gauges or gadgets, devices generally referred to as pigs or scrapers, to perform various maintenance operations.

3. Plug (sanitation) - Wikipedia

   en.wikipedia.org/wiki/Plug_(sanitation)

   A plug in sanitation is an object that is used to close a drainage outlet firmly. The insertion of a plug into a drainage outlet allows the container to be filled with water or other fluids. In contrast to screw on caps, plugs are pushed into the hole and are not put over the hole. Plugs are most commonly encountered in the bathroom or kitchen ...

4. Sump pump - Wikipedia

   en.wikipedia.org/wiki/Sump_pump

   A sump pump is a pump used to remove water that has accumulated in a water-collecting sump basin, commonly found in the basements of homes and other buildings, and in other locations where water must be removed, such as construction sites. The water may enter via the perimeter drains of a basement waterproofing system funneling into the basin ...

5. AS/NZS 3112 - Wikipedia

   en.wikipedia.org/wiki/AS/NZS_3112

   AS/NZS 3112. Australasian standard three pin plug, with part insulation on the Active/Line and Neutral pins. AS/NZS 3112 is the harmonised/joint Australian and New Zealand Standard for AC power plugs (male) and sockets (female). The standard is used in Australia, New Zealand, Fiji, Tonga, Solomon Islands, Papua New Guinea and several other ...

6. Fusible plug - Wikipedia

   en.wikipedia.org/wiki/Fusible_plug

   Fusible plug. A fusible plug is a threaded cylinder of metal, usually bronze, brass or gunmetal, with a tapered hole drilled completely through its length. This hole is sealed with a metal of low melting point that flows away if a predetermined high temperature is reached. The initial use of the fusible plug was as a safety precaution against ...

7. Trap (plumbing) - Wikipedia

   en.wikipedia.org/wiki/Trap_(plumbing)

   Trap (plumbing) Water seal in drain pipe under a sink. Water enters at right, fills the trap, and continues left. Inverted siphoning occurs below the line "A". 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 ...