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Short Answer: Choose a UV System with a recommended flow rate that meets or exceeds your peak flow rate. Sizing Ultraviolet Water Disinfection Systems (UV Systems) Question: What Size UV System do I need? When in doubt, always choose the next size up. Rule of Thumb for Sizing Water Treatment Equipment: In other cases, such as whole-house-filter systems, choosing an undersized filter can restrict the flow of water coming into the facility, causing significant pressure and flow drop when more than one fixture or appliance is running.
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In some cases, such as ultraviolet water disinfection, under-sizing a system or not planning for peak flows can result in untreated water passing through the system and contaminating the water already in the pipes and equipment.
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Proper sizing of water treatment equipment is critical for effective water treatment. How Do I Size My Water Treatment Equipment? The test may be repeated multiple times to ensure accurate results.Ĭalculate the flow rate as follows: 60 ÷ × = GPMĮnter how many seconds it took to fill the container, and how many gallons in the container used to measure then press 'calculate' to estimate your fixture's water flow rate.
Flow water full#
Stop the stop watch when the container is full and turn off the water.
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Place the empty container beneath the faucet and open the faucet completely while starting the stop watch. For this method, you will need a measured container (such as a 1-gallon water bottle or 5 gallon bucket), and a stop watch. The flow rate of an individual tap or plumbing fixture can be determined by measuring the amount of time it takes to fill a container with water. Timed Fill for Individual Tap or Plumbing Fixture Select the number of each fixture in your home and press 'calculate' to estimate your home's water flow rate. Note that your maximum possible flow rate will be restricted by the pipe size of your home or facility supply line. This gives you an estimated peak flow rate to use for sizing water filters, ultraviolet systems, or other water treatment equipment for your home or facility. List out all of the fixtures and appliances that use water in your home, and look at the chart to get an estimate of how much water each will use.Įstimate the maximum amount of these that you would feasibly run at the same time – and add up the flow rate for each of these devices (or use our calculator below). Estimated Flow Rates for Copper PipingĪnother way to determine your flow rate is to estimate the amount of water you will be using based on the fixtures and appliances in your home. The size of the plumbing limits the flow of water, so this can be used as a guideline for the maximum flow rate coming into your home in extremely peak usage. There are several ways to estimate the flow in your home to allow for proper sizing of water treatment equipment, described below.Ĭheck the pipe size at the entrance to your home or facility. This is why when sizing equipment, it is important to know the flow rate you are treating, and is best to plan for peak flow rates. Under-sizing equipment can result in insufficient contact time, and inadequate water treatment. When passing through water filters, softeners and media tanks, ultraviolet disinfection systems, or other water treatment devices, the water being treated requires a minimum amount of contact time with the filtration medium in order to remove the targeted contaminants. This is typically expressed in gallons per minute (gpm). Water filtration equipment is typically sized in terms of flow rate – which is the volume of water passing through it at any given time. This film is available at the Rachel Carson Center Library (RCC, 4th floor, Leopoldstrasse 11a, 80802 Munich) for on-site viewing only.What is My Home’s Water Flow Rate? © 2008 coop99, Katholisches Filmwerk GmbH. Trailer used with permission. Interviews with scientists and activists intelligently reveal the rapidly building crisis, at both the global and human scale, and the film introduces many of the governmental and corporate culprits behind the water grab, while begging the question, “can anyone really own water?” Beyond identifying the problem, Flow also gives viewers a look at the people and institutions providing practical solutions to the water crisis and those developing new technologies, which are fast becoming blueprints for a successful global and economic turnaround. Filmmaker Irena Salina builds a case against the growing privatization of the world’s dwindling fresh water supply with an unflinching focus on politics, pollution, human rights, and the emergence of a domineering world water cartel. 16 mm, 93 min. .įlow is an award-winning documentary investigating what experts label the most important political and environmental issue of the 21st century-The World Water Crisis. Frankfurt am Main: Katholisches Filmwerk GmbH, 2008.