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  2. Low-flow fixtures - Wikipedia

    en.wikipedia.org/wiki/Low-flow_fixtures

    Kitchen and bathroom faucets were limited to a flow rate of 2.2 gpm (gallons per minute) at 60 psi, and residential shower heads were limited to a flowrate of 2.5 gpm at 80 psi. [ 3 ] In response to an increasing number of water shortages and increased water utility rates there has been recent legislation by many states leading the way in water ...

  3. Residential water use in the U.S. and Canada - Wikipedia

    en.wikipedia.org/wiki/Residential_water_use_in...

    In an average home, showering is the second largest water use after toilets. The average shower uses 15.8 gallons (59.7 liters) and lasts for 7.7 minutes at average flow rate of 2.1 gallons per minute (gpm) (7.9 liters per minute). [1] On average, in a household of average size (2.65 persons) 12.4 showers are taken each week.

  4. Water filter - Wikipedia

    en.wikipedia.org/wiki/Water_filter

    Water purifier attached to a sink faucet. Point-of-use filters for home use include granular-activated carbon filters used for carbon filtering, depth filter, metallic alloy filters, microporous ceramic filters, carbon block resin, microfiltration and ultrafiltration membranes. Some filters use more than one filtration method.

  5. Air changes per hour - Wikipedia

    en.wikipedia.org/wiki/Air_changes_per_hour

    Air changes per hour, abbreviated ACPH or ACH, or air change rate is the number of times that the total air volume in a room or space is completely removed and replaced in an hour. If the air in the space is either uniform or perfectly mixed, air changes per hour is a measure of how many times the air within a defined space is replaced each hour.

  6. Navy shower - Wikipedia

    en.wikipedia.org/wiki/Navy_shower

    A ten-minute shower takes as much as 230 liters (60 U.S. gal) of water, while a navy shower usually takes as little as 11 liters (3 U.S. gal); one person can save up to 56,000 liters (15,000 U.S. gal) per year.

  7. Krauss-Maffei ML 4000 - Wikipedia

    en.wikipedia.org/wiki/Krauss-Maffei_ML_4000

    The Krauss-Maffei ML 4000 is a diesel–hydraulic locomotive, built between 1961 and 1969 by German manufacturer Krauss-Maffei in Munich, Germany. It generated 3,540 horsepower (2,640 kW) from two Maybach V16 engines. 37 examples were built in total, for two North American railroads and one South American railroad. They had a short service life ...

  8. Sanitation of the Indus Valley Civilisation - Wikipedia

    en.wikipedia.org/wiki/Sanitation_of_the_Indus...

    Great Bath, Mohenjo-daro A water well in Lothal Water reservoir, with steps, at Dholavira, Gujarat, India. The ancient Indus Valley Civilization in the Indian subcontinent (located in present-day eastern-Pakistan and north-India) was prominent in infrastructure, hydraulic engineering, and had many water supply and sanitation devices that are the first known examples of their kind.

  9. Hyundai Rotem HR5000 - Wikipedia

    en.wikipedia.org/wiki/Hyundai_Rotem_HR5000

    The HR5000 is an electric multiple unit rapid transit car ordered from Hyundai Rotem for the Los Angeles Metro Rail's B and D lines.. Following a decision by the Los Angeles County Metropolitan Transportation Authority (Metro) not to purchase additional CRRC HR4000 trains, bids were sought for new subway trains.