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Thread: Proper height and slope for reverse negative edge spa

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    Join Date
    Jul 2014
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    Proper height and slope for reverse negative edge spa

    Finalizing design with PB for our spring time build. We're considering changing the spa spill over feature to a reverse negative edge similar to the image below. Our spa height is 18" higher than the pool. What is the an appropriate spa height and slope angle to maintain a nice even sheet of water flowing over the edge?

    2015 Pool Build --> HERE IG 19'x47' w/ 7'x7' in pool spa; 3'6"-8' deep.
    Pentair 520 Filter, IntelliFlow VS XF Pump, IntelliChlor IC60 SWG, IntelliBrite/GloBrite LEDs, IntelliTouch w/Screenlogic2. 400K BTU heater. A&A G4V in-floor cleaning system. WetEdge Prism Matrix Pebble finish. TechoBloc Pavers and Coping.
    Test kits - Taylor K-2006 FAS/DPD, K-1766 Salt, SpeedStir

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    Patrick_B's Avatar
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    Re: Proper height and slope for reverse negative edge spa

    Sorry, that's a question for your designer that most of us will have a hard time answering correctly.
    TFP Moderator
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    JasonLion's Avatar
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    Re: Proper height and slope for reverse negative edge spa

    It is more about construction precision than it is about height and slope. Mostly it needs to be installed exceedingly level and uniform to get that uniform sheet of water effect.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Join Date
    Jul 2014
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    New England - MA
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    Re: Proper height and slope for reverse negative edge spa

    Thanks guys, I figured as much. When the snow melts the PB will be taking us to a few nearby pools with the same design.
    2015 Pool Build --> HERE IG 19'x47' w/ 7'x7' in pool spa; 3'6"-8' deep.
    Pentair 520 Filter, IntelliFlow VS XF Pump, IntelliChlor IC60 SWG, IntelliBrite/GloBrite LEDs, IntelliTouch w/Screenlogic2. 400K BTU heater. A&A G4V in-floor cleaning system. WetEdge Prism Matrix Pebble finish. TechoBloc Pavers and Coping.
    Test kits - Taylor K-2006 FAS/DPD, K-1766 Salt, SpeedStir

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