Black Scum in Tank

Discussion in 'Toilet Forum discussions' started by wallskev, Dec 29, 2012.

  1. wallskev

    wallskev New Member

    Messages:
    72
    Location:
    North Carolina,USA
    We have 4 Toilets - all Mansfield 160's.

    In ONLY ONE there is a Black Scum in places and some of this scum floats off when we flush.
    Where it is stuck on parts, it is hard to remove.

    This one toilet is used less frequency then others.

    Does anyone know what this may be and how to correct the problem from occurring ? :confused:

    Toiklet1_G.gif Toiklet2_G.gif
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,804
    Location:
    New England
    You didn't show a picture of the flapper valve...sometimes the rubber in it degrades and flakes off. It could be a mold and a thorough cleaning and disinfectant may be required. Regular use of things like bleach in the tank will eat up the rubber components and ruin them, so you don't want to use in-tank things. It could also be the insides of the hose used to connect the tank to the shutoff at the wall are breaking down.
  3. wjcandee

    wjcandee Wise One

    Messages:
    1,766
    Location:
    New York, NY
    Looks like that mold/scum thing. We have the same deal. Some toilets "catch" it, others don't, all in the same house. I had pretty good success just spraying everything down with Tilex Mold and Mildew remover and letting it sit for half an hour (after turning off the water and flushing to empty the tank, of course).
  4. gusherb94

    gusherb94 Member

    Messages:
    124
    Location:
    chicago/nw IN
    Only one of the 3 original toilets in our house caught that black scum thing. the two 3.5 GPF Wellworths didn't have it, the 3.5 GPF Eljer Emblem (terrible high flow flusher btw) had it, was the most used in the house. Never did anything about it except toss it out many years ago for a Drake.
  5. wallskev

    wallskev New Member

    Messages:
    72
    Location:
    North Carolina,USA
    Thanks for the recommendation. I will give the Tilex a try.
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