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  2. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure can slow the flow of water leaving the system, resulting in clogs, or cause siphonage to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.

  3. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    Torq-set is a cruciform screw drive used in torque-sensitive applications. The Torq-set head is similar in appearance to a Phillips drive in that it has a cross with 4 arms. In Torq-set however, the lines are offset from each other, so they do not align to form intersecting slots across the top of the head.

  4. Hex key - Wikipedia

    en.wikipedia.org/wiki/Hex_key

    A hex key (also, hex wrench, Allen key and Allen wrench, Unbrako or Inbus) is a simple driver for bolts or screws that have heads with internal hexagonal recesses ().. Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets.

  5. Power dividers and directional couplers - Wikipedia

    en.wikipedia.org/wiki/Power_dividers_and...

    The holes are spaced λ/4 apart. The design of such couplers has parallels with the multiple section coupled transmission lines. Using multiple holes allows the bandwidth to be extended by designing the sections as a Butterworth, Chebyshev, or some other filter class. The hole size is chosen to give the desired coupling for each section of the ...

  6. Squat toilet - Wikipedia

    en.wikipedia.org/wiki/Squat_toilet

    Squat toilet (flush toilet) with water cistern for flushing (Cape Town, South Africa) A squat toilet (or squatting toilet) is a toilet used by squatting, rather than sitting. This means that the posture for defecation and for female urination is to place one foot on each side of the toilet drain or hole and to squat over it.

  7. Screwfix - Wikipedia

    en.wikipedia.org/wiki/Screwfix

    Screwfix Direct Limited, trading as Screwfix, is a retailer of trade tools, accessories and hardware products based in the United Kingdom. [6] Founded in 1979 as the Woodscrew Supply Company, the company was acquired in July 1999 by Kingfisher plc , which also owns B&Q , and is listed on the London Stock Exchange .

  8. Toilet - Wikipedia

    en.wikipedia.org/wiki/Toilet

    A pit latrine, also known as pit toilet, is a type of toilet that collects human waste in a hole in the ground. [22] Urine and feces enter the pit through a drop hole in the floor, which might be connected to a toilet seat or squatting pan for user comfort. [ 22 ]

  9. Dry toilet - Wikipedia

    en.wikipedia.org/wiki/Dry_Toilet

    A dry toilet (or non-flush toilet, no flush toilet or toilet without a flush) is a toilet which, unlike a flush toilet, does not use flush water. [1] Dry toilets do not use water to move excreta along or block odors. [2] They do not produce sewage, and are not connected to a sewer system or septic tank. Instead, excreta falls through a drop ...