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  2. Electrical conductivity meter - Wikipedia

    en.wikipedia.org/wiki/Electrical_conductivity_meter

    An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. [1] It has multiple applications in research and engineering, with common usage in hydroponics , aquaculture , aquaponics , and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.

  3. Pressure Equipment Directive (EU) - Wikipedia

    en.wikipedia.org/wiki/Pressure_Equipment...

    The Pressure Equipment Directive (PED) 2014/68/EU (formerly 97/23/EC) [1] of the EU sets out the standards for the design and fabrication of pressure equipment ("pressure equipment" means steam boilers, pressure vessels, piping, safety valves and other components and assemblies subject to pressure loading) generally over one liter in volume and having a maximum pressure more than 0.5 bar gauge.

  4. Uniform Plumbing Code - Wikipedia

    en.wikipedia.org/wiki/Uniform_Plumbing_Code

    New alternate water sources for nonpotable applications and nonpotable rainwater catchment systems (Chapters 16, 17) based upon IAPMO’s Green Plumbing and Mechanical Code Supplement New Appendix L (sustainable practices) New minimum plumbing facilities table (Chapter 4) Water supply and drainage joint connection requirements (Chapters 6, 7) [12]

  5. File:Earth water distribution ppm chart.svg - Wikipedia

    en.wikipedia.org/wiki/File:Earth_water...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  6. Pipe marking - Wikipedia

    en.wikipedia.org/wiki/Pipe_marking

    Sprinkler Water: A13.1-2007/2015 [4] Meaning ... pressure and purpose in the system. ... RAL colour standard charts are used by architects, ...

  7. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices, [1] [2] reduced pressure zone assemblies (RPZA), [3] or reduced pressure principle ...

  8. Water flow test - Wikipedia

    en.wikipedia.org/wiki/Water_flow_test

    First, a static pressure gauge is attached to the test hydrant and the static water pressure is measured at the test hydrant. Second, the flow hydrant opened to allow water to flow in a fully open condition. Simultaneously the pitot tube pressure is recorded from the flow hydrant while the residual pressure is measured from the test hydrant.

  9. Pressure vacuum breaker - Wikipedia

    en.wikipedia.org/wiki/Pressure_vacuum_breaker

    A pressure vacuum breaker (PVB) is a type of backflow prevention device, used to keep non-potable (or contaminated) water from entering the water supply. A PVB is similar to an atmospheric vacuum breaker (AVB), except that the PVB contains a spring-loaded poppet. This makes it acceptable for applications that are high hazard or where valves are ...

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