How to clear water lines of scale and deposits

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by TOBe58, Dec 20, 2011.

  1. TOBe58

    TOBe58 New Member

    Dec 20, 2011
    Manassas, VA
    I recently replaced my master bath shower and when I turned the water back on I have very low water pressure. I bled all the air from all faucets when I turned the water back on and noticed a huge amount of crud. I turned off the water and opened up all faucets to allow the crud to flow to the lowest point and out the faucet in the basement. Still not any better so I drained my hot water heater and got still more crud out, but still low pressure. How can I clear the lines short of simply draining the lines this way?
  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Jan 5, 2008
    Test, Don't Guess!
    Land of Cheese
    Turning the faucets on and allowing the water to flush the lines is the best way to clear them. Start with the outside spigots and any faucets you have that do not have aerators. Then remove the aerators from any faucets that have them and flush those. Some faucets that use cartridges have screens in the them that may need to be disassembled and cleaned.
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  4. Tom Sawyer

    Tom Sawyer In the Trades

    Nov 29, 2010
    Easy Water.... Haaaaaa Haaaaaaaa
  5. mtcummins

    mtcummins In the Trades

    Jun 25, 2010
    General Contractor/Property Manager
    Pittsburgh PA
    Is the pressure low only at the new shower? Do you have the valve adjusted correctly? There are hot and cold adjustment screws on most faucets these days (to allow you to restrict the maximum temp at the shower). You may not have these open enough.
  6. LLigetfa

    LLigetfa DIYer, not in the trades

    Feb 6, 2011
    NW Ontario, Canada
    Normally, flushing the lines with water under pressure moves more crud than draining using just gravity. If the lines are so badly crudded that it restricts the flow, you may need to blow them out backwards with a compressor. Air can move through a restriction faster than water can but air does not carry the crud as well. You may need to repeat flush it forward with water and backward with air a few times. You might also mix air into the water stream into the forward direction as air behind water packs a good punch. A hard enough punch to knock a glass out of your hand at the sink.
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