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  2. Plumbing fixture - Wikipedia

    en.wikipedia.org/wiki/Plumbing_fixture

    In some occasional cases, a sink may have both a potable (drinkable) and a non-potable water supply. Lavatories and water closets normally connect to the water supply by means of a supply , which is a tube, usually of nominal 3/8 in ( United States ) or 10 or 12 mm diameter ( Europe and Middle East ), which connects the water supply to the ...

  3. Flatiron Building - Wikipedia

    en.wikipedia.org/wiki/Flatiron_Building

    At each story, the columns are connected horizontally by a grid of steel girders and floor beams, which mostly run parallel to the Manhattan street grid. [261] The spaces between the horizontal girders are spanned by flat arches made of terracotta. All of the floor beams could carry a live load of 75 pounds per square foot (3.6 kPa). [262]

  4. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.

  5. Sink - Wikipedia

    en.wikipedia.org/wiki/Sink

    A bottom mount sink at the Ernest Hemingway House. Bottom-mount or under-mount sinks are installed below the countertop surface. The edge of the countertop material is exposed at the hole created for the sink (and so must be a carefully finished edge rather than a rough cut). The sink is then clamped to the bottom of the material from below.

  6. Network protector - Wikipedia

    en.wikipedia.org/wiki/Network_protector

    Grid units will always be energized on the top side from the many other units tied into the grid. A spot network is 2 or more transformers dedicated to a single customer. The grid feeds multiple customers. A network protector has a circuit breaker set of contacts and a controlling protection relay. The components are enclosed in a protective ...

  7. History of water supply and sanitation - Wikipedia

    en.wikipedia.org/wiki/History_of_water_supply...

    A large well and bathing platforms at Harappa, remains of the city's final phase of occupation from 2200 to 1900 BC The bathroom-toilet structure of the ruler's house, on Lothal's acropolis c. 2350 BC Bathing platform and communal drain, Lothal's acropolis, c. 2350 BC Well, and drain, Lothal's acropolis, c. 2350 BC

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