After all, they don’t care about the efficiency of your pool system – you are paying the electric bill, not them. Two rotating Nozzels. Also consider that as the filter gets dirty, it gets more restrictive, and for this reason, some pool builders account for this when selecting the pump or filter. Heater = 7.5. Pool pumps produce different flow rates at varying levels of resistance. Thank you for any help you can provide in advance. Add up all of the 90’s and 45’s used in the plumbing, above ground and below ground. The output of a pump can vary by 40 or more GPM depending on the feet of head, and style of pump, The charts in the article are there to give you an idea how GPM is affected by the pipe size. Pool pumps that are too large also compromise filtration and can even damage a filter that is too small. First up, you need to figure out how many gallons of water are in your swimming pool. For example, for the STANDARD TEE, in Plastic: On the other hand, a Whisperflo 1-HP (purple line) will pump 80 gpm at 60 ft of head, as shown right. Both will get you where you want to go, just one has a bit more style, or more features. The smaller ID pipe has less inside surface area and therefore less friction. If you look at MATTHEW SIMMONS’s numbers: Okay, we now have everything we need! The resistance in a pool system, or pool feet of head is what the pump has to overcome, and can also be thought of as Friction Energy. Here are the flow rates for common filter types and sizes. Looking for pool parts? This will force water up into the pump. Look at the Hayward Superpump VS or Pentair SuperFlo VS or the Waterway 140 VS pump. Replacing my state-rite set up P2RA5F/US Motor EUSQ1152 set up and want to get something more up to date. Put the drain king in and found another problem, water coming out of the drain when the valve was on closed. The formula for Turnover requires that you know your pool size – in gallons. That page is a nice find, good info. Take into consideration, that a homeowner would only be using this once. Atmospheric Pressure Pressure caused by the weight of the atmosphere. (Meanwhile, any dummy can use a bunch of 90 deg elbows.). With two turnovers per day, your minimum flow rate comes to 20.8 GPM. The VS950 produces almost 3x the flowrate of the Maxflo VS500 – and that’s not a good thing, in your case. Pros and cons please. Variable speed pumps can be adjusted in flow rates, and are required next year, so maybe that is the best route. DE filters are a little rangy as well. PO Box 509 Coolalinga, NT 0839 Thank you for the advice. might add a few ft head to calcs as safety. Add these all up, to calculate the total feet of head measurement that your new pool pump must overcome. See the example below of a WhisperFlo pump curve; the lines labeled by letters are horsepowers from .5 and up. 3. It is WRONG!! Measure the lengths of the pressure side pipes in the same manner, noting the degree of turns and any valves you can see. The question based only on those two models, which would be the most efficient in energy consumption? The Hayward filter can use a Slide Valve SP0410X502S, which will require some replumbing to fit. Temps in spring and fall average 65*. If not, break out the calculator, and a measuring tape, if needed. I used 70 GPM as our flow rate in my calculations. Something like the Hayward 21″ Sand filter system, our item E3231, would be a good size. You have to take the lower of those two values to make sure you don’t overwork any components of your pool, so your maximum flow rate comes to 43 GPM. Living in central Fl myself, once winter comes and temps fall below 65, you will not be able to keep the pool at 85F, not with solar. Up to 76% of pool pumps were built with pumps that are too large relative to the pipe diameter. This will help us figure out how much water needs to be circulated in an 8 hour period and give us an idea of the required turnover rate. Have a pool on the second floor, but the pump/filter is on the ground about 10′ below the bottom of the pool. Total of 4.69 added feet of head for connectors. Converting to “LOSS OF HEAD” (at 70 gal/min), we get the following:
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