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Thread: How necessary are UV filters?...

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    Join Date
    Jun 2013
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    central texas
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    How necessary are UV filters?...

    We are in the process of getting bids for our backyard pool and so far UV filters have been an optional item. Some builders give long sales pitches and recommend them others just include them in the quote (still an option) but don't discuss it. They run around $1500. Is this something we need? Rather use the money on a larger pool if possible...
    19,700 gallons non SWG
    Pentair DE quad 100 filter
    Auto chlorinator and nature 2
    Inground pebble
    Intelliflo variable speed 3 HP pump

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    Mod Squad JohnT's Avatar
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    Apr 2007
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    SW Indiana
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    Re: How necessary are UV filters?...

    Welcome to TFP!

    Not necessary at all.

    I'd consider them almost useless unless your pool is used regularly by people you don't know well or you expect wildlife to make use of it.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: How necessary are UV filters?...

    I was told UV filters use less chlorine so they pay for themselves in a few years. Untrue?
    19,700 gallons non SWG
    Pentair DE quad 100 filter
    Auto chlorinator and nature 2
    Inground pebble
    Intelliflo variable speed 3 HP pump

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    Mod Squad JohnT's Avatar
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    Re: How necessary are UV filters?...

    Quote Originally Posted by Freakaloin
    I was told UV filters use less chlorine so they pay for themselves in a few years. Untrue?
    Actually, the UV system may use up some of your chlorine itself.

    Though the UV does sanitize the water as it passes through the unit, the sanitizer in the pool is what prevents person to person transmission of pathogens. When something contaminates your pool, it could be 8 hours or more before that contaminant passes through the UV sanitizer.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Join Date
    Jun 2013
    Location
    central texas
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    Re: How necessary are UV filters?...

    Thanks man! We will definitely put that money to better use now!
    19,700 gallons non SWG
    Pentair DE quad 100 filter
    Auto chlorinator and nature 2
    Inground pebble
    Intelliflo variable speed 3 HP pump

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    Isaac-1's Avatar
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    May 2010
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    SW Louisiana
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    6,711

    Re: How necessary are UV filters?...

    There might be some situations where UV systems decrease the use of Chlorine, but I suspect most of these would involve a pool that was already out of balance, in a correctly balanced pool you will see the benefit to them to be minimal and they will increase Chlorine consumption as Chlorine breaks down under UV light.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
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