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Thread: Will going to a SWG kill my heater?

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    Join Date
    Oct 2014
    DFW Texas

    Will going to a SWG kill my heater?

    I have been considering going to a SWG. I have 2 reservations.

    1- I dont like the salty taste of the water..... however, I probably should be keeping the pool water out of my mouth anyway so this isn't a deal breaker.
    2- I am worried about my Heater.

    at face value, Salt causes more corrosion, one would think... However chlorine is pretty bad as well.

    Is going to a SWG going to rust out my heater core?
    7-10 year old In ground 20,000 gal, Aquabright ecofinish W/ Spa, Propane heater, waterfall and infinity jet, 60 sq foot DE filter, Intellitouch+Intelliflow pump, IC40 cell, Racer cleaner

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    Mod Squad Jimrahbe's Avatar
    Join Date
    Jul 2014
    Bedford, TX

    Re: Will going to a SWG kill my heater?

    As far as the taste goes, it is not much. About like the taste of tears. When I first jump in the pool, if I think about it, I can just taste the salt. After a couple of minutes I don't notice it at all.

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Caldera Spa.

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    JoyfulNoise's Avatar
    Join Date
    May 2015
    Tucson, AZ

    Re: Will going to a SWG kill my heater?

    At 3600ppm, your water will be 10X less concentrated than sea water and you'll hardly be able to detect the salt by taste.

    Salt does not CAUSE corrosion it only ENHANCES certain forms of corrosion (eg, crevice corrosion). The primary driver of corrosion in a heater is pH. Properly balanced water is the best defense against heater core corrosion. I have an SWG and a heater and my equipment is just fine.

    If you've been using bleach or any chlorine product, chances are your water already has at least a 1000ppm or more of salt in it as all chlorine products and muriatic acid adds salt to your water.

    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    chiefwej's Avatar
    Join Date
    Jun 2011

    Re: Will going to a SWG kill my heater?

    I wouldn't be concerned about that. There are many more complaints about SWG pools and erosion of natural stone features than problems with metal corrosion. That can be an issue in hot dry climates like yours and mine. It's also particular to softer stone like they commonly use in Texas.
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, H400 & Heliocol Solar, Dolphin S-300, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit, Smart Home/Alexa pool control

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    espejo's Avatar
    Join Date
    Nov 2014
    Kingwood Texas

    Re: Will going to a SWG kill my heater?

    JoyfulNoise is correct. I have been manually adding bleach for about 7 months and just recently converted to SWG. I was anticipating having to add 12 bags of salt to get to 3200ppm recommended level for my SWG. But after testing my pool was already at 1400ppm for salt just on bleach addition alone.
    40x15 IG, 19,000 gallons, Taylor K-2006C, Intellichlor IC40, Pentiar 1.5 hp Intelliflo VS, Pentair 420 Clean/Clear Filter, Speedstir, Stonescape - french grey, Travertine Paver decking, Completed August 1, 2015.

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