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Thread: Converting from liquid chlorine to salt

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    yzf600's Avatar
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    Apr 2013
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    Converting from liquid chlorine to salt

    Last weekend I decided to convert from liquid chlorine to an IntelliChlor generator. While waiting for the device to arrive, I dumped 8 bags of Diamond Crystal water softner salt (99.5% pure) into the pool I shut off my pool cleaner, turned the pump on for 8 hours and went for a swim to get all the salt dissolved. Within 2 hours all the visible salt crystals were dissolved.

    The next day I happened to watch the pool as the pump kicked on and I saw all the returns blast brown clouds into the pool. I realized that the brown was previously filtered dust from my DE filter. I completely disassembled the filter and inspected every grid for tears, looked at the manifold for cracks and even looked at the spring tube. Everything looked good. I replaced the o-ring between the manifold and pcv up tube since it was streched, as well as took apart the slide valve and re-lubed it. Unfortunately none of this helped. My next steps are to replace the slide valve o-rings, then the manifold, then the grids.

    It seems very suspect that my DE filter has issues immediately after I put salt into the pool. I would not think the salt would affect it. Could the salt cause the plastic or rubber to swell or shrink? I've only owned my house for a year and the DE filter plastic looked brand new when I moved in (Phoenix sun will age plastic like nothing else). Has anyone else seen similar behavior out of a DE filter after adding salt? Perhaps there is some industry experience with converting to a salt pool you all could share.
    15k gallon, salt water, plaster, Pentair IntelliFlo pump, Hayward 48 sq ft DE filter, Pentair Intellichlor, hayward Aquanat 200 pool vac ultra located in Phoenix, AZ

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    chiefwej's Avatar
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    Re: Converting from liquid chlorine to salt

    I didn't convert, but I have been operating a salt pool with a DE filter in Tucson for ten years now. I have never had an issue.
    chiefwej
    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, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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    yzf600's Avatar
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    Re: Converting from liquid chlorine to salt

    I found the problem. Upon tearing down the filter for a 2nd time, I saw one of the grids had a 1" tear at the bottom where the circular tube is. Either it was coincidence, or some of the rocks of salt got pressed up against the hole and poked through.

    Note to self: inspecting 48sq ft of DE grids in 105 around 1 hour before sunset = rush job.
    15k gallon, salt water, plaster, Pentair IntelliFlo pump, Hayward 48 sq ft DE filter, Pentair Intellichlor, hayward Aquanat 200 pool vac ultra located in Phoenix, AZ

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    bobodaclown's Avatar
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    Re: Converting from liquid chlorine to salt

    Glad you found your problem. You'll still be using chlorine, but in the gaseous form. A SWCG produces chlorine gas from the salt water.
    More reading here: http://www.troublefreepool.com/conte...generators-swg

    It lessons the daily maintenance requirements that's for sure.
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    Richard320's Avatar
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    Re: Converting from liquid chlorine to salt

    Quote Originally Posted by yzf600 View Post
    I found the problem. Upon tearing down the filter for a 2nd time, I saw one of the grids had a 1" tear at the bottom where the circular tube is. Either it was coincidence, or some of the rocks of salt got pressed up against the hole and poked through.

    Note to self: inspecting 48sq ft of DE grids in 105 around 1 hour before sunset = rush job.
    Didn't your shop teacher ever mock you with, "There's never time to do it right, but there's always time to do it over?"
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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