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Thread: Rust in water tank

  1. #1
    DIY Junior Member jack z's Avatar
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    Default Rust in water tank

    I have city water the house is 12 yreas old with pvc pipe. I just replaced my 3rd elect. water tank. The tank gets rusty and has to be replaced, I do have a water softner unit also and wonder if the water softner is creating the rust problem. No info from my local plumber or the water softner company. Thank you jz.

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    DIY Senior Member Reach4's Avatar
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    Do others in your neighborhood have short lives on water heater tanks? I am guessing that your city water is particularly corrosive.

    When you say rusty, I am guessing you mean the tank leaks.

    I would consider using a powered anode to prevent internal rust. While it costs more, you don't have to change out the anode, and can, in fact, move the anode to the next tank.

  3. #3
    DIY Junior Member jack z's Avatar
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    Quote Originally Posted by Reach4 View Post
    Do others in your neighborhood have short lives on water heater tanks? I am guessing that your city water is particularly corrosive.

    When you say rusty, I am guessing you mean the tank leaks.

    I would consider using a powered anode to prevent internal rust. While it costs more, you don't have to change out the anode, and can, in fact, move the anode to the next tank.
    No the others have no problem tanks are over 14 yrs. old they are on city water but no softner units.

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    DIY Senior Member Smooky's Avatar
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    Depending on several factors of your drinking water, reducing the hardness may result in corrosive water. Waters softer than 50 mg/l CaCo3 is considered to be corrosive. You would need to do a chemical water sample to be sure.

    http://www.cleanwaterstore.com/techn...s/langlier.php

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    Retired Defense Industry Engineer jadnashua's Avatar
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    Water is sometimes called the universal solvent...yes, it can take millennia, but most things can be dissolved by it. The purer it is, the more aggressive it is. That being said, most of the time, it's luck of the draw.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    DIY Member dw85745's Avatar
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    As I recall, when we started using Colorado River Water ( in Tucson, AZ) there were a lot of pipe problems because of the "Ph" of the water.
    I know pinhole leaks in copper (especially horizontal lines) is of a particular problem because of "Ph".

    1) I would have your "Ph" tested (your water company should provide a list of chemicals in the H20 as well as "Ph" on a periodic basis.)
    2) You MAY be getting H20 from a different well than your neighbors.
    3) If the same well, I'd look to see what your H2O lines are made of.
    If black or galvantic pipe they may rusted (on the inside) and dumping rust into your tank.
    4) Maybe getting a dialetic reaction. Are you using dialetic nipples (plastic coated) -- or -- copper fittings (not brass or stainless steel) to galvanized fittings or to the tank?
    Some research seems to indicate improper electrical grounding of the house contributes to tanks rusting faster (causes these dialetic problems)
    5) That said, all H20 Tanks rust inside, and maybe your neighbors have bought a 12 to 15 year tank, where yours is just a 6 year tank.
    Last edited by dw85745; 01-08-2014 at 01:06 PM.

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