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  2. Bathtub refinishing - Wikipedia

    en.wikipedia.org/wiki/Bathtub_refinishing

    Bathtub refinishing (also known as bathtub reglazing, bathtub resurfacing, or bathtub re-enameling) is a process of restoring the surface of a bathtub to improve its appearance and durability. It involves applying a new coating or finish on the existing bathtub surface, which can be made of materials such as porcelain , fiberglass , acrylic ...

  3. Plumbing fixture - Wikipedia

    en.wikipedia.org/wiki/Plumbing_fixture

    Each of these plumbing fixtures has one or more water outlets and a drain. In some cases, the drain has a device that can be manipulated to block the drain to fill the basin of the fixture. Each fixture also has a flood rim, or level at which water will begin to overflow. Most fixtures also have an overflow, which is a conduit for water to ...

  4. Bathtub curve - Wikipedia

    en.wikipedia.org/wiki/Bathtub_curve

    The bathtub curve is a particular shape of a failure rate graph. This graph is used in reliability engineering and deterioration modeling. The 'bathtub' refers to the shape of a line that curves up at both ends, similar in shape to a bathtub. The bathtub curve has 3 regions: The first region has a decreasing failure rate due to early failures.

  5. Air gap (plumbing) - Wikipedia

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

    According to the International Residential Code 2003, an air gap length must meet the requirements of being two times the effective inner diameter of the pipe (2×D) in order to be sufficient. [2] A standard widely use in the United States is: A112.1.2 Air Gaps in Plumbing Systems (For Plumbing Fixtures and Water-Connected Receptors)

  6. Moody chart - Wikipedia

    en.wikipedia.org/wiki/Moody_chart

    Measurements of fluid flow in artificially roughened pipes by J. Nikuradse [5] were at the time too recent to include in Pigott's chart. The chart's purpose was to provide a graphical representation of the function of C. F. Colebrook in collaboration with C. M. White, [ 6 ] which provided a practical form of transition curve to bridge the ...

  7. Invert level - Wikipedia

    en.wikipedia.org/wiki/Invert_level

    Invert level affects flow from drainage pipes. In civil engineering, the invert level is the base interior level of a pipe, trench or tunnel; it can be considered the "floor" level. [1]

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  9. Bathtub - Wikipedia

    en.wikipedia.org/wiki/Bathtub

    A bathtub, also known simply as a bath or tub, is a container for holding water in which a person or another animal may bathe. Most modern bathtubs are made of thermoformed acrylic, porcelain-enameled steel or cast iron, or fiberglass-reinforced polyester. A bathtub is placed in a bathroom, either as a stand-alone fixture or in conjunction with ...