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  1. #1
    Join Date
    Jun 2005
    Location
    London
    Posts
    2,324

    Default Anyone any experience with Commoderizer stopping calcium build up in marine toilets

    On the Cruisers forum I came across mention of a system for treating the inlet water for salt water flushed toilets. In essence it chlorinates the water as it goes through the strainer
    The company's website is https://www.commoderizer.com/
    As someone who regularly adds hydrochloric acid to the toilet to reduce/clear the inevitable calcium build up the theory seems sound

    Has anyone fitted this to their own boat who might share their experience?

    Thanks

    TudorSailor (when no commercial link etc)

  2. #2
    Join Date
    Nov 2008
    Posts
    6,856

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    I'm not persuaded that a build-up of calcium is "inevitable". Sufficient pumping is all that's needed. Jabsco recommend a minimum of seven pump strokes per metre of outlet tube. I do a little more, and now have no problems.

  3. #3
    Join Date
    May 2001
    Location
    North Wales, sailing Aegean Sea or Menai Strait
    Posts
    21,854

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    Trouble is there is a conflict if you have a holding tank. Minimise flow to keep the tank availiable as long as possible, maximise it to keep carbonate salts to a minimum.
    Answers to some technical queries at new website http://coxeng.co.uk

  4. #4
    Join Date
    Jun 2005
    Location
    London
    Posts
    2,324

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    Quote Originally Posted by NormanS View Post
    I'm not persuaded that a build-up of calcium is "inevitable". Sufficient pumping is all that's needed. Jabsco recommend a minimum of seven pump strokes per metre of outlet tube. I do a little more, and now have no problems.
    We have a Jabsco electric toilet and so do not control the flush volume. We could press the buttin twice but as Vyv says, double flushing may reduce the calcium but will result in the holding tank filling twice as fast!

    TudorSailor

  5. #5
    Join Date
    Nov 2008
    Posts
    6,856

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    Ah well, if you have an electric toilet and use a holding tank, you have circumstances which you did not state in your original post. Tough!

  6. #6
    Join Date
    Feb 2009
    Location
    Greece (Aegean)
    Posts
    2,691

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    Quote Originally Posted by NormanS View Post
    I'm not persuaded that a build-up of calcium is "inevitable". Sufficient pumping is all that's needed. Jabsco recommend a minimum of seven pump strokes per metre of outlet tube. I do a little more, and now have no problems.
    Quite correct, I always flush fully and haven't had problems with Calcium build up in pipes. I'm fortunate to have 2 heads and only pee in the forward one (no holding tank) followed by 24 strokes. Aft head goes to a holding tank and does get the odd treatment with slightly diluted hydrochloric acid. Forward head has a T from basin outlet and gets fresh water and sterilised every couple of months.

    Different story with only one head or if both fitted with holding tanks.

    I must admit that $200 for an inline block holder and $99 for tablets seems a bit steep. Obviously not bleach if they are addressing Calcium build up. I imagine it's a slow release acidic material, quite a few options giving an acidic environment. I can't imagine any costing $99 for tablets but it isn't something I've ever investigated.

  7. #7
    Join Date
    May 2018
    Posts
    701

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    Damn sight cheaper to flush with cheap vinegar every now and then!

    Anyhoo, what is the chemistry of calcium buildup in a loo? I've always wondered where it came from.

  8. #8
    Join Date
    Sep 2002
    Location
    Essex
    Posts
    233

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    Agree that extra flushing is one way to reduce calcium build up.

    I used to flush with vinegar regularly, but am now convinced that it speeded up damage and hardening of the rubber internal fittings to our Blakes's pump. I used the replacement/service pack recently - not cheap!

  9. #9
    Join Date
    Aug 2007
    Location
    Suffolk
    Posts
    5,152

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    Quote Originally Posted by Old Bumbulum View Post
    Damn sight cheaper to flush with cheap vinegar every now and then!

    Anyhoo, what is the chemistry of calcium buildup in a loo? I've always wondered where it came from.
    I can’t remember the exact chemistry, but essentially it is reaction between urine and seawater. If you flush sufficiently then that reaction does not happen in your outlet pipe.

  10. #10
    Join Date
    May 2001
    Location
    North Wales, sailing Aegean Sea or Menai Strait
    Posts
    21,854

    Default Re: Anyone any experience with Commoderizer stopping calcium build up in marine toile

    Quote Originally Posted by Old Bumbulum View Post
    Damn sight cheaper to flush with cheap vinegar every now and then!

    Anyhoo, what is the chemistry of calcium buildup in a loo? I've always wondered where it came from.
    People refer to it as 'calcium' but in fact they are insoluble salts, comprising magnesium hydroxide, calcium carbonate, calcium sulfate and others. It seems the proportions of each can vary according to several factors such as temperature and the way they are formed from seawater.
    Answers to some technical queries at new website http://coxeng.co.uk

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