Need help negative edge pool
tmccabe1
8 years ago
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Iconic Design
8 years agolast modified: 8 years agoRelated Discussions
Negative edge
Comments (12)Natural, I am with the group a little. I understand what you are saying, it is easier and less complex to oversize the trough. I laugh everytime I vist Firerock and see all the edge pools overflowing down the mountain. Owning a neg edge pool myself, when I get a bunch of kids in the pool playing the trough fills up fast. Thats with a 2hp pump returning the water. I guess I could of designed a second pump to kick in when this happens but why. I have designed both ways, where space is a premium, and with "free play pool". Infact we did just that on one, made a large playpool for the youngones, though not free. I really dont think of it as a cop out. These pools can be very complex, and one sensor failure and it all goes to s***....See Moredoes neg. edge pool require two pumps?
Comments (4)shellip, Scott is correct. There are several ways to plumb these pools. I have usually used a single pump system. As Scott indicated, it depends on the look you want on the backside of the dam wall and the length of the wall. I treat the basin as a big skimmer and pump everything thru the filter. A well built wall will only require 1-3 gpm/ft of wall to look good. Variable speed pumps work very well for these pool applications. It's also a good idea to run the pump while the pool is being used so the kids don't splash out so much water that the basin is overflowing. 2 pump system: One pump filters the pool water just like a normal pool. The second pump draws unfiltered water from the basin and puts it in the pool. The second pump should be running while the pool is in use(splash out reason I described above). It will also need to be run each day because the automatic water fill is placed in the basin. IMO the one pump system filters all the water all the time and I find it more efficient. Having a hand held or other electronic control is really handy for this application when you want to turn the pump on without having to go out to the equipment area each time. Biggest factor to good operation is sizing the basin correctly. Better to big than too small. You might ask your PB how he calculated the basin size. He should be able to tell you how much water will be in the basin with the pump running and about how much freeboard area they are allowing for. Good luck....See MoreNegative Edge
Comments (6)mark1969, The plumbing is rather simple once you have your basin size and edge size down. You just have to figure out what pump and sizes of plaumbing will deliver the correct amount of gallons for the desired flow. The calculations are what can be tricky. You have to calculate how much water you want/need going over the edge (1/8"....1/4" etc.) Figure in surface area of the entire pool to raise that much, water in transit over the edge, etc and convert to gallons. Then size your basin accordingly. Then figure in bather load based on how many people you believe could get in the pool. convert their body mass to gallons if you want it to really come out right..etc etc etc. Now figure in a water leveler...but wait, it cant run continuously while the edge is on and be filling the basin because then it will overflow when the edge pump shuts off and that 1/4" of water flows down into you basin raising it substantially based on the pool size. You should be forced into using an electronic water leveler, in my opinion. Not that that helps a ton without all of the formulas. but you get the idea......See MoreNegative edge
Comments (9)Poolio- Congratulations on your new pool. We just opened our new pool a month ago and I can understand your situation regarding pre-teen energy causing too much water in the trough. I too have an infinity edge and the ability to change speeds on the infinity edge pump to have different waterfall effects. I have a 2 speed pump instead of variable speed. Our infinity edge system sounds similar to yours in size, 16 feet of infinity edge in an arc with the trough being 3 feet deep by 3 feet wide or about 1,300 gallons. The pool is 30,000 gallons for a ratio of 23:1. An autofill system keeps the trough water level at the bottom of the 6" waterline tile when the pump is running on high speed. My PB said this is to protect the life of the plaster. When the pump is off, the trough level rises to just below the overflow pipe which is halfway up the 6"tile. From my experience so far, the higher pump flow is needed to remove heavy overflow from large waves. The low speed, which is about 50 gpm in my case, will handle moderate waves all day long, but larger waves over short timeframes require high speed to remove the water from the trough fast enough, about 140 gpm in my case. I would not recommend keeping the waterline below the tile line to expose plaster very long. This is not good for the life of the plaster and will only delay and not eliminate overflow when the big waves persist for long periods of time. It is the rate of water removal that is important when heavy waves happen and not the trough volume. The extra trough volume will only delay overflow but not entirely prevent overflow. Regarding sound at high speed, do you have a throttle valve at the discharge of the pump. Sometimes this valve can be used to adjust the backpressure on the pump and minimize sound at the cost of slightly higher watts. Although I think the 4x160 will try to compensate for the backpressure and run faster which may increase sound and watts. Someone else who knows this pump will have to help with this question. After living with our infinity edge pool for a month now, I am glad we have one. The advantages outweigh the disadvantages from our perspective. Advantages: The appeal and wow factor plus built in skimmer for leaves and anything else that floatsÂeasier to clean debris out of a 3x3 trough instead of the pool itself. Disadvantages: Water loss due to heavy waves when pump is on low speed. Water loss due to rainfall is also increased because the trough canÂt hold as much extra water as the pool could without the infinity edge, this is where a larger trough volume would help. Did I mention the wow factorÂ.we love our infinity edge despite the water loss shortcomings which are minimal. Hope this helps....See Moretmccabe1
8 years agoIconic Design
8 years agolast modified: 8 years agotmccabe1
8 years agoIconic Design
8 years agoIconic Design
8 years agotmccabe1
8 years agotmccabe1
8 years agolast modified: 8 years agotmccabe1
8 years agoIconic Design
8 years agolast modified: 8 years agoIconic Design
8 years agotmccabe1
8 years agotmccabe1
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8 years agotmccabe1
8 years agoIconic Design
8 years agoAqua-Link Pools and Spas
8 years agolast modified: 8 years ago
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