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Thread: pools over 50 years old

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    rabbet's Avatar
    Join Date
    Jun 2012
    Garrison, NY

    pools over 50 years old

    I'm curious to know if there are others in this forum who have old pools. Mine is 62 years old. I'm considering SWG and am wondering if it might be corrosive to my main drain pipe which is cast iron.
    40K gallon IG painted concrete
    no skimmers
    Triton II sand filter
    2 HP Hayward pump
    Built June 1950

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    elwood58's Avatar
    Join Date
    May 2012
    Sun City West Arizona (2nd Home)

    Re: pools over 50 years old

    Ours is only 28 years old, so plumbed with PVC. It will be interesting to see who chimes in with advice on this one.
    14100 Gal IG MiniPebble, Pentair Intellichlor IC-40 SWG, Sand Filter, Pop Up Cleaning, Intelliflo VS Pump, Aquacal Heatpump/Chiller, 1/4 Acre Desert Landscaped, Lots of Deck. Built in 1984, updated in 2012 and 2014
    "If you don't measure it, you can't manage it!"

  3. Back To Top    #3

    Join Date
    Jun 2011
    Long Beach, CA

    Re: pools over 50 years old

    My guess is that I would not run a SWG with a cast iron main drain, seems like a recipe for a "little" rust.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    In the Industry
    Qwaxalot's Avatar
    Join Date
    Jun 2012

    Re: pools over 50 years old

    I would totally agree with staying away from a SWCG on a pool this old. Even the SWCG manufacturers will advise you to stay away from stainless steel filter tanks, much less iron or copper plumbing!
    In the industry, CSP (Certified Service Professional) by the NSPI and it's successor the APSP. My company services over 600 pools every year. I think the practices regularly espoused on this forum (especially the BBB method) are outstanding; however my comments will be often oriented towards the goal of getting it done, and getting it done right now!

  5. Back To Top    #5

    Join Date
    Aug 2010
    Dallas, TX

    Re: pools over 50 years old

    I don't know if my main drain is iron or not, but it's that old. All the plumbing I've been able to see at this point has been copper, not iron. Keep in mind that ships with tons of iron on them go to the bottom of the sea and stay in great shape for ages, and the salt concentration in the sea is 10x what will be in your pool. And, I've had iron pipes rust (sewer) in both my older homes, with no salt present. I'm thinking it's the combination of air and water that rust, not a constant underwater situation.

    My opinion? I am not going to give you one. Contact the SWCG manufacturer and see what they say.

    I put in my sig line that my pool is circa 1960. If it was built when the house was built, it was built in 1954. There was an addition put on my house, including the pool, not too much longer. So I don't know the exact age of my pool, but I can say between it and my irrigation system it's the most copper I've ever seen in my life!
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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