entitled Energy Efficient Sizing of Swimming Pool Pumps ,Motors and Filters, (EAP-PF1) from the National Spa and Pool Institute, 2000 K Street, NW, Washington, DC 20006. wet-niche mounted fixtures. It’s essential to match the heater size with the pool capacity. 360 ft Natural 2-1/2 in. If you would like to use a calculator to determine how many gallons are in your pool you can use the Pentair Pool Volume Calculator by following the link. Built by Quaker, this drain is made from rigid PVC for long-lasting durability. 5, which is approximately how many gallons are in a cubic foot. at _____ gpm Maximum System Flow Rate. 288 square meters. 321 x flow (in gpm)/open area (in²) The equivalent pipe diameter of an open can be calculated from the following formula: Equivalent pipe diameter (inches) = 2 x. 5 feet. 145 inches. Outside diameter 60. Nearly all pool equipment, pumps, heaters, filters etc are made with inch and a half fittings on them. 260 150 ft PRO 700 ft. Multiplying that by the depth gives the volume in cubic feet. 120. Vacuum Gauge Hg: 15. 60. TDH is crucial in determining the right pool pump size and ensuring efficient water circulation. Higher values mean a more efficient pump. 5 h. Looking to understand pool pipe sizing? Our guide provides information on how to size your pool pipes correctly to ensure optimal flow and performance! Jan 1, 2018 · Download Sump Pump Size Excel Sheet Calculator - 1/01/2018 03:31:00 PM Sump Pump or submersible pump is used in firefighting, plumbing or industrial application for pumping fluid which it is submerged in. The fact is that you would be better off with 2. It allows designers to input various parameters, perform calculations, visualize designs, and make informed decisions based on accurate Nov 29, 2018 · The surge tank size depends upon the surface area of the swimming pool. 69 added feet of head for connectors. May 22, 2013 · The vast bulk of existing domestic swimming pools in the UK will have been constructed using “inch and a half” pipework. 5 = Pool Volume (Gallons) Round or Circular Pool. (For single pump pool/spa combo, use the higher of No. I was sent a pack of 5 jets where the diameter of the threaded portion measured 1. Other values, besides internal pipe diameter, can be calculated as well. or sq. ) As you'll notice below, most of these formulas are multiplied by 7. Please note the diameter of swimming pool pipe is measured internally. 87 $99. 5 x avg. 116 ft and horsepower requirement of 0. Where. For example, a 16 foot by 32 foot pool would have 16x32=512 square feet of surface area. Input your swimming pool's dimensions, using feet and inches. pump than 1. These 2 solutions require a watertight seal to be applied to the bottom and walls of the tank. 5 inches. 5 for Rectangle, Square, or Free-Form pools. Please design a filter system to filter the water in this pool at a filter loading rate of 10 gallons per minute per square foot of filter surface area with a pool turnover time of 4 hours. Determine the flow rate needed to achieve your desired pool 1 Standard Pools: 6 hours (360 minutes) or product of 1. The swimming pool pipe diagram usually includes the following components: Main drains: These are located at the bottom of the pool and help to remove debris and water. Since the system can be run in either spa or pool mode, you have to calculate the flow rate each way. Typically a 0. To extend the swimming season a larger heat pump is 2" White PVC Pressure Pipe 2. We have a swimming pool of 20000 gallons of water, and need a turnover of 8 hours The pipe length from the swimming pool to the pump and from the pump to the pool is 30 meters, the pipe diameter is 2 inches, the piping system has 6 in number 90° Standard Elbows, 3 in number 45° Standard Elbows, 4 fully open Ball Valves. 00 (£33. 60 inc VAT) Quantity. 48 = 4,680 . 01252 216 050. 75 inches, too big to fit in the 1. $175. 14 x144 Using the Average Depth formula: (3+8)÷2=5. Click “Calculate” to see the Rigid PVC Pipe. For an oval pool, the formula is Pi x Pool Length x Pool Width / 4. Calculating the average depth of your pool is not easy because most pools have a shallow end and a deep Pool Size. A = Cross-section area of Pipe or (A=π/4 * D 2) V= Velocity in pump suction side (velocity in the suction pipe is generally considered in the range from 06 to 1. You can calculate flow velocity for the given fluid flow rate and internal pipe diameter. 7%) OKU panel pool coverage (that is of the pool's surface water area) is a common sizing. So, for example, if you have a 40ft x 14ft pool at an average of 4ft depth, our calculator tells us the volume is approx. V. Feb 22, 2023 · Total Dynamic Head (TDH) is the measure of resistance in a pool’s plumbing system that a pump must overcome to circulate water. The required basin volume is the actual volume you intend to drain, not the provided or total volume which is often larger. Total Dynamic Head. View All Calculators. 125 ft. Determine the Average Depth: To determine the average depth in a pool where the bottom slopes, measure the shallow Pool Total Dynamic Head Calculator. 32 millimetres. Class D 12. - Balance tank volume of 5. 375 inches. Rigid PVC pipe being used to plumb a pool should be a minimum Schedule 40 which is the standard for pool plumbing pipe. com/pages/pump-replacement. 5m length. Following this, you can use the chlorine dosing calculators to work out the Our white PVC pool pipe has UV stabilisers added to it that stop, or greatly reduce any degradation due to exposure with sunlight. 5mm 2"  52mm  60mm   The movement of the water to and from your swimming pool depends more on pipe size than pump size. 25 x Depth x 7. 5 * base * height * depth). 482143 m2 for the given pump flow rate. NAT 150 ft. 14 (π) to calculate the diameter of your pool hose accurately. 2 inch PVC Pipe. Calculate the size of heat pump you need for your swimming pool with this handy swimming pool heat pump size calculator, get in touch for a free quote. 75 Horse Power pump is the one you need. Formula Pool Size: 100ft long x 60ft wide = 1600 Sq. After that you will make water supply pipe sizing calculation for determining the internal pipe sizes. However, the exact size of PVC pipe required for your pool pump will depend on several factors, including the size of your pool, the distance between the pump and the pool Aug 12, 2020 · As you determine which pipes are best for pool installations, you must also select the right fittings. Most local and state health codes require one (1) gallon of surge capacity for every one (1) sq ft of pool surface area. The pool size measurements will help you find the cubic footage of the pool, and multiplying this by 7. 0 m is the recommended depth. The required water flow is 23 cubic meters per hour. 5 will help you find a close estimate of volume May 8, 2024 · When you size a pool heat pump, you will need to know the pool’s volume. Circle: Area = Radius x Radius x 3. You should have half of the pool surface area in solar panels. Feb 26, 2023 · Calculating your pool pump’s GPM is easier than you might think. 047 inches. Use the LED Fixture Calculator to establish the number This document provides calculations for the design of a swimming pool and kid pool. 5 ft3 May 5, 2021 · 2. For Mar 16, 2024 · How to Match Heater Size with Pool Capacity. 48 = 11,968 gallons. Some may have been built using 2 inch but they would generally be bigger pools. Spa Mode – 73 GPM (One 2. The pool will use 2 pumps with a total Oversizing. It takes into account factors such as friction loss, elevation change, and water features. Pump Sizing. The calculator uses imperial measurements for the calculations. It has heavier walls than other systems which allows for greater water volume capacity. Let us say you need to fill a swimming pool with a simple rectangular shape such as a semi-olympic size with a length of 25 meters and width of 12. Buy on Amazon If you click this link and make a purchase, we earn a commission at no additional cost to you. 2 cubic meters for the swimming pool. 1492 m3/hr which can be achieved using two pumps. Feet of Head (resistance). But not all. The calculator’s Length x Width x Depth x 7. Type in the length, width and average depth of your pool into the boxes below and click on the 'calculate' button and the volume of your pool in cubic metres and gallons will be displayed. A common pool size, such as 16 x 32 feet, requires minimum BTU output to efficiently raise water temperature. The Role of a Spreadsheet in Swimming Pool Design. Last update on 2023-06-10 at 01:14. Once the water has passed through your skimmer, it will enter the suction lines. Pool Supermarket (08) 8381 1932 enquiries@poolsupermarket. It's around 550,000 imp gal and 660,000 US gal. Pool Type and required turnover rate denominator in minutes (Use chart to the right) 2. Once you input these temperatures and your pool’s dimensions, the tool calculates the heat energy needed and the duration required to heat the pool effectively. 5 inches for the discharge side. 0 m is the minimum, but 3. 5 = Pool Volume (Gallons) Oval or Rounded Rectangle Pool. 4 ‘ by the same number used in the length of pipe calculation above for 70 GPM and 2’ PVC diameter pipe, 7. The required volume for the water balancing tank is 7. If you're looking for the best ABS & PVC swimming pool pipes & fittings, look no further than 1st Direct Pools! Browse your range of 1. Pipe that is 2" in diameter can hold pressure of 166 PSI. Pool water flow rate is important for determining the turnover rate and ensuring the pool water receives adequate filtration. Note: This calculator calculates the total area within the red line. Since there are 7. Enter the pump efficiency factor, a value between 0 and 1. Step 3: Measure the distance between the marked points and calculate the diameter. 3: Elbows: This is a connector pipe that connects a straight piece of suction lines to direct it either left or right. 76 = 4. 1250 divided by 60 gives you 20. 5m Length. A spreadsheet can significantly simplify the swimming pool design process by providing a structured platform for calculations, data organization, and analysis. 5 and 2-inch pipes today. Olympic-size swimming pool contains 2,500,000 L of water, assuming a nominal depth of 2 m. 154 inches. 48. 50 See how much you can save with our other pool product calculators. Swimming Pool Main Drains must be installed in accordance with the VIRGINIA GRAEME BAKER POOL AND SPA SAFETY ACT and all applicable ASME/ANSI safety standards. 400 ft. i. 73. Finding the surface area of the pool requires determining the shape of the section being calculated: Square/Rectangle: Area = Length x Width. - Heating requirement of 19. 5" or 3" pipe will result in far lower resistance with greater efficiency and lower electricity cost. 5 to arrive at the volume of the pool, expressed in gallons. Minimum Flow Rate. Two filters are selected, each with an area of 0. 100. 8. £420. 14 x 7. if you need 6kW for 10,000L at 27-28°C, you would need 10kW for 30°C. You can choose between seven different shapes. Ft. pump. m) VVV = Average velocity of the water (ft/min or m/min) For vanishing edge pools, you'll want to ensure that the flow rate matches the designed overflow rate to maintain the illusion of the vanishing edge. The average outdoor inground pool in the UK is around 10m x 5m with an average depth of 1. The pump flow rate is expressed in litres per minute (LPM) and calculated by dividing the pool volume by the turnover time. 76 per 100’ of pipe. 5 meters (compared to an Olympic swimming pool which is 50 meters by 25 meters). Schedule 80 pipe can also be used, but is not necessary and generally more expensive compared to the Sch 40 so is not commonly found in pool plumbing. These are the plumbing pipes, usually made from PVC, that direct water around the structure or pool. x 25 ft. Suction Pipe size @ 6 fps _____inch Return Pipe size @ 8 FPS _____inch The right piping size calculation needed for refilling a swimming pool. swimmingpoolsteve. To reach a higher water temperature a larger heat pump is recommended – you should look to increase capacity by approximately 2KW for each degree you want to raise the pool temperature above 27-28°C. I returned the pack, and requested the correct size. So you need to choose a pool pump with a capacity greater than 8m3 per hour. 5bar WP. LOW PRESSURE, SINGLE STAGE PIPE SIZING FOR GAS LINE CONNECTIONS Natural gas at 1000 BTU per Cubic Foot Propane Gas at 2500 BTU per Cubic Foot MODEL 100 & 75 150 200 250 300 350 400 525 750 900 1/2 in. 5 inch White PVC Flex Pipe 30m Roll. 48 = 4,680 Jan 17, 2024 · 2: Suction Lines. 0. Dec 7, 2018 · Download free excel sheet xls for all plumbing design calculation including water supply and drainage calculation. For example, if your L-shaped pool has one section that is 20 feet long and 10 feet wide with an average depth of 8 feet, and a second section that is 10 feet long and 10 feet wide, with an average depth of 6 feet, you will calculate the volume like this: 20′ × 10′ × 8′ × 7. In the diagram to the right, the system is plumbed in 2. This document calculates various parameters for the design of a 370 square meter public swimming pool with an average depth of 1. Nov 20, 2019 · A two inch square pool deck drain is the smallest option we have available. 5" Threaded to 3/4" Open" jets from an online retailer. 8 kW heater is selected. For residential pools, heater sizing calculations begin with the pool surface area. 443961 HP. Pipe Size     Internal Measurement     External Measurement 1. 5. If a pool of water is to be maintained between storms, do not include that volume. Holds 11 large or 98 small bromine or slow dissolving trichlor tablets. Apr 1, 2008 · Let’s illustrate all of this with a simple 40-by-20 foot rectangular pool with a knife-edge overflow system and, therefore, an edge 120 feet long. Pool Gallons: NaN. For a 24-foot round pool, it's 3. html - Before purchasing your new swimming pool pump, determine the size of plumbing on the suct Dec 18, 2014 · We get many customers who are confused as to what size swimming pool pipe they need, this video explains how to tell if you have inch and a half (1. 4 / 100 x 7. I purchased a 5-pack of "Pool and Spa Eyeball Jet 1. It adapts well to all standard 1 ½” plastic fittings and the joints bond together like PVC pipe. To work out the volume of your pool, please use our swimming pool volume calculator . Feb 16, 2024 · Here is the pool volume formula: Length x Width x Average Depth x Multiplier = Volume in US Gallons. - Pump head of 85. Sep 13, 2023 · Formula: Q=A×VQ = A \times VQ=A×V. 08 cubic meters. Suction Pipe size @ 6 fps_____ inch Return Pipe size @ 8 FPS _____ inch For a large overflow pool, the balancing tank, also named surge tank, is generally built in concrete in the pump room. Although 1 1/2" and 2" are the main white pool pipe sizes found in non-commercial swimming pools, hot tubs and spas, other sizes of pipe and fittings from either our Schedule 40 or any of our standard grey inch Jan 1, 2019 · A pool is 75 feet long by 25 feet deep with an average depth of 4. NAT PRO 400 ft Propane 3/4 in. 14 x Length x Width x 0. Those two formulas can be used to calculate the surface area of most pool sections. 4. 5 gallons in each cubic foot, multiply the cubic feet of the pool by 7. Like pipes, fittings also come in both Schedule 40 and Schedule 80 (schedule refers to the thickness of the sidewalls, therefore Schedule 80 is thicker than Schedule 40). PVC Schedule 80 Sizes Table. Calculate The Pools Surface Area. SN22-Swimming Pool calculation: Download Link : 1. This measurement will be in inches. First, calculate the pool volume: 75 ft. Click for pools over 20k gallons. depth (in hours), whichever is less; Wading Pools: 60 minutes; Spas: 30 minutes. Calculate Faircloth Skimmer® Size. 9 for Round or Oval pools. existing installations. Adjust sliders to calculate pool total flow rate. It determines the pool volume, number of water inlets and pumps, sizing of supply and suction pipes, required filter area, heating and cooling loads, pump head, and lighting requirements. A pump’s performance data is provided in GPM (output) vs. Pressure Gauge PSI: 23. 1. Straighten the string and measure the distance between the two marked points using a ruler. 83 gallons per minute of flow. For a smaller pool, the overflow gutter can be used as a balancing tank. Next, divide 64 by 8 and hey presto you get 8m3 per hour required. There are three factors that will affect the system operation: Jul 1, 2009 · If you have long pipe runs and will need higher flow rates (say, for a solar system), then using 2. Pool Flow Rate Calculator. 4 in the following calculations for the pool & spa) Determine Pipe Sizes: Branch Piping to be _____ inch to keep velocity @ 6 fps max. au 41 Main South Rd, O'Halloran Hill South Australia 5158, Australia Trading Hours Monday to Friday 9am - 5pm Saturday 9am - 3pm SWIMMING POOL PLAN REVIEW CALCULATIONS, COMPONENTS AND PIPING (February 2024) (√) beside item # if correct; (X) if need info or not approved for plan review letter. Return jets: These are the outlets through which the filtered and On any deck-level system a balance tank will be incorporated to ensure that the pool water remains at the optimum level for effective surface water removal under all operating conditions. 00 For over 24 years we have been the UK's favourite online swimming pool supplies store Calculate Your Pool Volume. Some pipes might be smaller or bigger than your samples. 5m/s. This is how long you want it to take for the entire pool’s volume to circulate through the pump once. The document provides calculations for properly sizing a swimming pool, including: - Pump capacity of 37. To do piping size calculation, follow these steps: Find the inner diameter and length of the pipe, in inches or millimeters. 5" pipe and a 1. DERWATER POOL LIGHTING GUIDEThe following information will help to determine the lighting requirements for commercial swimming pools an. Example 1: Rectangular Pool. Trunk Piping to be _____ inch to keep velocity @ 8 fps max. The pipe volume formula is: Volume = pi x radius² x length. Pool perimeter (lengths + widths) _____FT (circle perimeter = πd) 3. 2-3/8 inches. This technical note details PWTAG’s recommendations for optimum balance tank specifications. Multiplier = 5. With just a few simple measurements and calculations, you can determine the GPM for your pool pump. 6875 KW and cooling capacity of 22. Assuming you can achieve a tolerance along that entire edge of plus-or-minus 1/32 of an inch, we start by calculating the flow over the edge as one-half to one gallon per linear foot per minute. 4: Pump: To calculate internal pipe diameter, you should only enter flow rate and velocity in corresponding fields in the calculator and click calculate button to get results. It determines the volume of water needed is 99. Mar 17, 2024 · A pool heater size calculator simplifies this process by considering the pool’s current temperature and the desired temperature you aim to achieve. Pump Calculator. Just enter the dimensions of your pool (in metres) and the calculator will work out the approximate volume of your pool (a metric converter is provided to aid you with this). 1 day ago · To calculate the Olympic swimming pool volume, you need to know its dimensions. 1 Standard Skimmer with 2 Main Drains & 3 Returns. It can also give you an estimate of how much the water you use will cost. Water Pipe Sizing:This video describes that how you can calculate maximum possible flowrate of water that can be passed through a pipe of certain dia. 5' Average Depth. Check out Pentair's easy-to-use pool volume calculator to calculate the volume of your swimming pool water by choosing the shape, dimensions and depth. Using a concrete surge tank for a large pool offers several Pool Volume Calculation Examples. 69. 14 × Radius 2 × Depth x 7. PoolStore's handy volume calculator will help you. Knowing the TDH is important for choosing If you need any advice, you can contact our expert technical team on 0333 900 4040. Round pool = radius (ft) x radius x average depth x 3. 10′ × 10′ × 6′ × 7. Calculate the volume of a Kidney shaped pool in US and Imperial gallons. 0″ pipes) The pool filtration flow rate shall not be greater than the rate needed to turn over the pool water volume in 6 hours or 36 gpm whichever is greater. 5in) or t Nov 16, 2022 · Our guide provides handy tables of approximate water flow rates based on pipe size, helping you estimate capacity quickly and easily. 20000. Oval pool = ½ length (ft) x ½ width x average depth x 3. ft. 70 ft. MEP WORK provides plumbing engineers with a comprehensive spreadsheet contains all calculations needed for design of plumbing works like water supply, drainage, swimming pool etc. Total of 4. Florida Building A Swimming Pool Chemical Calculator. Enter the current flow rate of your pump in gallons per minute. Instructions: Select your pool shape. Mar 8, 2016 · To convert this value to feet of head, multiply 60. 70. Length x width x depth x 7. 5" wall pipes. Schedule 80 PVC pipe is only compatible with external-fit fittings. With a kidney-shaped pool, measure the widest point at both ends to get your A and B width Jun 27, 2020 · From http://www. It will help you avoid the risk of damaging the system. Download also: Plumbing Calculator: Hot Water The formula used by the "Pool Square Footage Calculator" is as follows: For a rectangular pool, the formula is Pool Length x Pool Width. For a round pool, the formula is Pi x (Pool Width / 2) ^ 2. 14. The length of the pool is 50 m, width 25 m, and the depth varies: 2. e. Mar 1, 2024 · The calculation utilizes the following formula: Evaporation rate = K * A * ΔT * v * (1 – H) Where: A: Pool surface area (measured in square feet) ΔT: Temperature difference (in degrees Fahrenheit) v: Wind speed (in miles per hour) H: Humidity factor (a dimensionless value between 0 and 1) K: Constant value (varies depending on formula and Start by calculating the volume of water in your pool using our Pool Water Volume Calculator. Round pools use the formula of pi times radius squared. Skimmers: These are responsible for drawing water from the surface of the pool and removing floating debris. PLEASE FILL IN ALL FIELDS! Total Dynamic Head is a sum of the flow resistance added to the pump from the installed pipe size, pipe length and equipment. 0. Determine the Multiplier: Multiplier = 7. 150 ft. A poorly connected fitting could lead to leaks and breaks as well. 5m. 0 inch pipe. 9mm. 5" plumbing and a 3/4 h. A 28. 3. Only a few health codes require two (2) gallons of surge capacity for every one (1) sq ft of pool surface area. Gauges are inserted into the two drain ports at the base of the pump. 7 meters located in Bahir Dar, Ethiopia. 0″ pipe) Pool Mode – 146 GPM (Two 2. Our pool pump calculator provides estimated information regarding pool pump usage and savings to help you choose the best pool pump for your backyard. But remember, the plumbing system in your swimming pool might be different in size. 27838 tons or 3807 The flow through a grating can be calculated using the following formula: Velocity (fps) = . 30,000 divided by 24 gives you 1250 gallons required per hour. p. You enter the base, height, depth, and the unit of measurement (feet, inches, or meters) for your triangular pool. Feb 16, 2019 · Keep this in mind as even conventional pool collectors do tend to take a lot of space, for example in the pool heating industry 2/3rds (66. It calculates the volume of the pool using the formula for the volume of a triangular prism (0. However, pumps are designed to have some "head" or resistance so the pump should be appropriately sized for the system. NAT 500 ft. This pool volume calculator will let you know the amount of water you will need to fill a number of different size/depth pools. com. Number of Days to drain is usually determined by local or state regulations. Jul 15, 2015 · The diameter of these pipes is 1. 9 m3. Not cycling enough water through the filter can result in swimming pool algae blooms, cloudy pool water, and water balance issues. For a 50,000L pool with a turnover time of 6 hours, the calculation would be: Pump Flow Rate = 60,000 L / (6 hours x 60 minutes / hour) Pump Flow Rate = 60,000 L / 360 minutes = 167 LPM. The surface area of your pool is found when you multiply length by width of your pool. 64 cubic metres. *American National Standards Institute and published by the American Society of Mechanical Engineers. Next day delivery of imperial (inch) white PVC pipe for swimming pools. Mar 8, 2018 · hot and cold water supply system calculation excel sheets calculators, these spreadsheets will help you estimate the domestic water demand , cold and hot, by calculating wsfu. 5" 42mm 48. There is a bunch of math in this video. 390 ft. Part Number: 3400020-P2. If you want to make this simple or have a round or odd shaped pool, use Example pool - If a pool has a volume of 10,000 gallons then you should buy a filter that can handle up to 30,000 gallons every 24 hours. So, while estimating its maximum flow rate, take the smallest value you get. 3mm, wall thickness 3. Includes results for the pool surface square footage and a reasonable close perimeter measurement. £28. Using these figures, a standard swimming pool would have a volume of around 75m3. Enter the desired turnover rate in hours. Flow and sizing for typical Natare drains, gratings and outlets. - Filter area of 0. Total Dynamic Head: 9 ft of water + 23 ft of water = 32 ft of water. You can put a larger pump on a pool with larger pipe but you can't put a larger pump on a pool with smaller pipe. 5 = volume (in gallons) Length times width gives the surface area of the pool. Currently in stock at our UK warehouse. 2. The calculator converts the measurements to a consistent unit (feet) for calculations. 5 ft = 8437. 1600 x 15 CPSF = 24000 24000/2486 = 10 fixtures of 4426 36 LED, 86 W. Jun 10, 2023 · Rainbow 320 automatic chlorine/bromine in-line pool and spa feeder. In residential areas, it is required to limit the water flow velocity to a maximum of 8 feet per second (8 ft/s). Desired Turn Over Time. This means that for pools of less than 13000 gallons, the pump shall be sized to have a flow rate of 36 gpm or less. 5 = Pool Volume (Gallons) Kidney-Shaped Pool. 57 −$75. 1 SIZING FILTRATION AND CIRCULATION SYSTEMS Proper sizing of swimming pool filters, circulation pumps, and pipe Jul 8, 2024 · It is recommended to use a PVC pipe with a diameter of at least 2 inches for the suction side of the pool pump and a diameter of at least 1. To Calculate the Diameter of the Pipe: Q = A. Oct 3, 2022 · Calculating the size and volume of your pool. 3 or No. Here is a step-by-step guide: Step 1: Measure the diameter of your pool’s suction pipe using a tape measure. We now have all the information necessary to select the proper size pump and/or filter and then proceed based on new vs. The above excel sheets include wsfu to gpm calculator. The pool filtration flow rate shall not be greater than the rate needed to turn over the pool water volume in 6 hours or 36 gpm whichever is greater. Divide this measurement by 3. Volume of Pipe Formula. 6. Where: QQQ = Flow rate (GPM or LPM) AAA = Cross-sectional area of the pipe or channel (sq. x 4. na ur zt yl zb ir ry fg lb tu