how to calculate feet of head pool pump
Before replacing the pool pump, its important to calculate the Total Dynamic Head. A pump’s flow rate is dependent on the feet of head of your plumbing system, and that measurement is featured in every pump curve chart. For example, if your filter pressure x 2.31 = 30, assume that the vacuum reading would equate to 10 ft. of head. To ‘Calculate the System Head Requirement’, you will need to know 3 things: The total of the above 3 things will give you your ‘Total System Head Requirement’ in meters. My pool is in central Florida.
He got the formula from our local energy company who provided rebates based on this calculation they provided.
3. Pump Head Calculation. Thanks for the assistance. I just want I pump that works wtf. There are a few primary factors that go into finding the right size pool pump. I would go for a Variable Speed pump, since they are going to be required anyway. To calculate the system resistance, add together these two sums: Multiply the clean filter pressure by 2.31 to measure resistance after the pump; Multiply the pump vacuum by 1.13 to measure resistance before the pump ; Add the two together to compute the total resistance in the system. You never want to put more pressure in your pipes than they can handle. The chart shows the feet of head per 100 feet of pipe according to the pipe diameter of Schedule 40 PVC in congruence with the flow rate of your pump. I’m not an expert but the calculations for the vertical rise and fittings seem incorrect. When building an inground pool, the best way to size the pool pump is to calculate the total resistance in your pool pipes and plumbing, adding up all of the pipe, fittings, valves and other equipment, to come up with Total Resistance, measured in feet of head. In the “Dips and Turns” section, a number of 1.5 inch items have lower head than the 2.0 inch items, which seems very wrong. Average depth is calculated by adding the deepest part of the pool to the shallowest part of the pool, and dividing by 2.
– “Dips and Turns” is measured in “FEET” (measured in feet) GATE VALVE 6 8 48 Enter total pumping lift or height (feet) water is pumped vertically. Thank you for your insight. In these table, 1 elbow would be in the neighborhood of 6 equivalent feet of straight run pipe compared to 9 for STA-RITE. How the heck do you find out how much pipe and elbows you have if its buried in the ground? I was wondering if you have charts for pipes and fitting going up 6″ PVC? MaxFlo VS500 all the way, baby! Evaluate your pool and find out the correct pump size for your pool. All the elevation changes net out to zero in a hydraulically filled system. But what Matthew has done, is provide a very excellent start. TDH = Vac inches X 1.13 + Filter PSI X 2.31. I’ve got 143 Ft 1.5″ PVC x 28.6/100 = 40.9 Head Feet? Should l have my pool guy put in a bigger pump or add a second one? For example, if the pool’s pump is 3’ above your pool’s surface, add 3’ feet to 15.2. Same for check valves, or one-way flow valves, which add more resistance to the system. Use our pool volume calculator below and then we’ll start calculating the minimum flow rate you need for your pump. To calculate the system resistance, add together these two sums: Now, most pool owners don’t have a vacuum gauge installed before the pump. Extreme Leaf Removal. You’ve come to the mountain top, seeking wisdom and truth, or the answer to a question that has plagued humanity for all time… “What is the best pool pump?”. The pump is the Pentair SuperFlo VS. Is this pump a good match for the Quad 60 in the case of 6600 gallon pool? However, if the goal is to determine GPM, would it not be even more useful to use a gauge that measure GPM, position it at each of the outlets and sum up the values of each? This will force water up into the pump. So in a few years, when I am ready to replace everything, and install a modern automated pool… I’ll dig up that whole area and re-plumb it all neatly to get rid of that spaghetti mess and make it a truly energy-efficient system. Okay, let’s move on to the next part of our pool pump sizing – figuring out your maximum flow rate. To convert this value to feet of head, multiply 60.4 ‘ by the same number used in the length of pipe calculation above for 70 GPM and 2’ PVC diameter pipe, 7.76 per 100’ of pipe. Indeed, this is not true with pool pumps. Whether you need a remodel, a new pool, or just some maintenance help, HomeAdvisor will find the best professional for the job. For each 90 degree fitting or valve between the pool and the pump, add 1 ft., or 0.5 ft. for 2 in. Enter flowrate delivered by the pump (gallons per minute). Am I missing something? Finally, when you have the total lengths of pipe all added up, horizontal and vertical lengths of pipe, and you know the pool filter rate of flow, you can calculate how many feet of head the pool pipes are contributing. We’ll go into more specifics on TDH in another post. Add up the Valves or Reducers used in the system – These will all be above ground and visible. For example, If you have a Pentair SuperFlo, you may replace it with the same horsepower SuperFlo, or a Hayward Super Pump, or Pureline Prime. Most people that have a 2-speed or variable speed pump run the pump nearly all the time, but on a very low speed for like 20-hrs per day, and high speed for 4-hrs per day.
Yes, basically a just a bunch of black pipes – except it adds up to thousands of feet, and a roof gets sun all day long, while a fence only gets sun, less than half the day. I purchased a home with an in-ground pool and single speed pump and I don’t know how it’s plumbed. Therefore, the lesson learned is: Add up all of the underground plumbing pipe to the pipes you can see above ground, in between the pump, filter and heater. I’m not sure that you can run a suction cleaner from it, but you can run a robot, which does not connect to the filter system. New pool owner here with a probably dumb question. Earl, small pool. Add another skimmer, a heater and maybe a spa and more complex pools can be much higher, in the 45-60 ft/hd range. 60.4 / 100 x 7.76 = 4.69. These losses also need to be factored into the calculation. So, we must account for that extra resistance. You can set multiple speeds to match your existing equipment, and at the same time cut your electrical usage in half. pipe. I plan to backwash the pool and see how long it takes to fill a 5 gal bucket.
50 14.3 4.16
Thank you for you advise, Jeno. Hi Roy, the 16″ Intex sand filter would be a good size. Okay, let’s move on to the next step. Without the great step by step explanations. Filters can be a real drag on water as it rushes through your plumbing. Simple or Complex Pool? GPM takes into account your pool size and the number of “turnovers” you need per day (your turnover rate). Do you have a recommendation? I have another question. 300 square feet surface area = 80-112 GPM, 400 square feet surface area = 100-150 GPM. This is because of the surface area inside the pipes. Don’t I need a minimum of four 1″ returns to prevent back pressure reducing the flow? In my case, my pool equipment is about 3 feet below the waterline. 4. Also, is a 3HP pump what I should be using? Another option with less math involved, is to buy a variable speed pool pump. Even if you can’t move down in hp, you are still saving energy, by reducing the load on the pump motor. Once you have the approximate number of gallons of water in your pool, we have to figure our minimum flow rate for the pump, using a Gallons Per Minute (GPM) calculation. Even after I read all of your blogs. Would be nice if we had a link for the STA-RITE CHART – Google Sta-Rite only gets a sales site. I would like to purchase the right pump for my needs this time around. The SuperFlo has less pre-set speeds, and fewer diagnostic bells and whistles, but would work fine on your pool, running a few hours longer than the Intelliflo, but that depends on speed actually, it could run less than the Intelliflo, it all depends. Copyright © 2020 INYOpools All rights reserved. I know that the TriStar line is more efficient than the MaxFlo, but since it is a smaller motor, it consumes less?
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