![]() Here’s where we get to lack of understandable data and overselling of pool pumps. Knowing the exact volume of water returning to the pool lets you make a precise calculation to decide how many hours to run your pump. With the complexity of variable speed pump flow rates manufactures now have made graphs of TDH ( Total Dynamic Head) vs GPM more readily available. Some high end variable speed pumps do come equipped with a built in flow meters but most don’t. The answer is we don’t, and the solution is fitting a pool flow meter to monitor things. With three four or more variable speed settings on the pump how do we know how much water we are circulating into the pool every day. It’s a good thing, a very good thing, but it amplifies all the issues we’ve looked at above. With this in mind single speed (3450 rpm) and two speed pumps (3450 or 1725 rpm) will almost certainly be forced and phased out in favour of variable speed pumps nation wide. California has been way ahead of the game in enforcing strict guidelines for pool pump specification. The pool industry and state governments are finally addressing the amount of energy expended on running a pool pump. If it is then we’re just throwing money away.Ī pool flow meter will be even more important in the near future. Having a flow meter installed insures our pool pump isn’t running more than it needs to. The difference is we’re paying our energy bills. In our case we need a pool flow meter for the all the same reasons. It’s a major factor in verifying the health of the water. The inspector needs to see the hourly volume of water being pumped through the pool. They’re subject to regular city inspections. Commercial swimming pools must be fitted with a flow meter. Why guess and estimate when you can read an exact value off a flow meter. Installing a flow meter to the pool plumbing discharge side, it’s a “no brainer” and it’s cheap. It’s the only real way to know how many GPH is being pumped to your pool. We just need a pool flow meter, how simple is that. Let’s forget theoretical calculations, flowcharts and tables and join the real world. Sure you do if you want to calculate your flow rate the right way. To top it all off these tables are often hard to find on some manufacturers websites. Feet of head tables make an educated estimate on GPM volumes being pumped into a pool.īut at the end of the day they’re just a best calculated guess. Pump manufacturers have had a stab at estimating the difference feet of head scenarios make to their pumps performance. “Feet of head” is the combined result of everything listed above. Even when your filter is dirty will reduce flow rate to the pool a tad. Expect a further reduction if you’ve got a heater or solar panels plumbed in. There’s a lot of things here, but wait there’s more. So the amount of water circulated to your pool is related to the diameter of the pipe, the length of pipe, how many bends in the pipe, the type of filter, if there’s a multivalve in the system, and how many other valves are in the system also factor in. It’s one compelling reason why you need a pool flow meter fitted. That’s one reason why it’s difficult for the manufacturer to advertise a meaningful GPM value. The volume of water a pump delivers to your pool is directly related to everything attached to it. Things change when it’s connected into a pool system though. If there’s nothing attached to it then it’s a simple calculation. Obviously a pump does have a measurable output of water. There’s a couple of good reasons for that. You’ll find it’s a little tricky to round up all the data you need for your simple calculation. Pumps are sold by HorsePower not gallons per minute or gallons per hour and all plumbing setup are different. That’s true it is, but OOPS ! there’s a problem. Just take the pool water volume and divide it the gallons per hour and there’s your answer. Without proper calculations it’s meaningless. ![]() But what’s that based on ? Well the simple answer is nothing. You’ll often see the number 8 as a minimum number of hours to run the pool pump every day. ![]() ![]() Additional equipment like solar panels, or a pool heater have got to be taken into account too.īut how many pool owners are able to calculate what a complete circulation actually means ? How many hours to run the pool pump. A pool needs to be filtered, chemicals dispersed and the surface skimmed. There’s quite a lot to unpack to decide when and how long to run the pool pump. Thats why it’s called a complete circulation. Circulated means the entire pool volume filtered through the surface equipment once. Everyone knows a pool needs to be circulated at least once a day.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |