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  2. Hach Company - Wikipedia

    en.wikipedia.org/wiki/Hach_Company

    Hach Company manufactures and distributes analytical instruments and reagents used to test the quality of water and other liquid solutions. Manufactured and distributed worldwide, Hach systems are designed to simplify analysis by offering on-line instrumentation, portable laboratory equipment, prepared reagents, easy-to-follow methods, and technical support.

  3. Swimming machine - Wikipedia

    en.wikipedia.org/wiki/Swimming_machine

    A swimming machine, also known as a resistance swimming apparatus, is a self-contained device powered by a pump, designed to facilitate stationary swimming for athletes or recreational users. This can be achieved by either propelling water past the swimmer or providing support for the swimmer, either within a water environment or on dry land. [1]

  4. Hydraulic head - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_head

    On Earth, additional height of fresh water adds a static pressure of about 9.8 kPa per meter (0.098 bar/m) or 0.433 psi per foot of water column height. The static head of a pump is the maximum height (pressure) it can deliver. The capability of the pump at a certain RPM can be read from its Q-H curve (flow vs. height).

  5. Affinity laws - Wikipedia

    en.wikipedia.org/wiki/Affinity_laws

    The affinity laws (also known as the "Fan Laws" or "Pump Laws") for pumps/fans are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric flow rate, shaft speed) and power. They apply to pumps, fans, and hydraulic turbines. In these rotary implements ...

  6. Hydraulic calculation - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_calculation

    In locations where a municipal connection is not possible or practical, the required water may be drawn from an open body of water (e.g., lake, pond, river) or a water storage tank. Hydraulic calculations determine if the available water supply pressure is adequate to provide the sprinkler system design flowrate.

  7. Swimming pool service technician - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_service...

    This swimming pool service technician is using a pool skimmer to remove debris from a courtyard fountain at an apartment complex in Tulsa, Oklahoma.. A swimming pool service technician is a person who maintains swimming pools, including keeping the water clean and safe by fixing pool equipment such as pumps, motors and water filters.

  8. Hazen–Williams equation - Wikipedia

    en.wikipedia.org/wiki/Hazen–Williams_equation

    The Hazen–Williams equation is an empirical relationship that relates the flow of water in a pipe with the physical properties of the pipe and the pressure drop caused by friction. It is used in the design of water pipe systems [ 1 ] such as fire sprinkler systems , [ 2 ] water supply networks , and irrigation systems.

  9. America's Swimming Pool Company - Wikipedia

    en.wikipedia.org/wiki/America's_Swimming_Pool...

    America’s Swimming Pool Company (ASP) is a franchised swimming pool service chain, specializing in swimming pool maintenance, repair, and renovation. Stewart Vernon founded America's Swimming Pool Company in 2001 [ 1 ] in Macon , Georgia , where the franchise headquarters resides.

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