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Thread: Odor in supply line water

  1. #1

    Default Odor in supply line water

    This is an odd one. I have an older home with well water, very hard and very salty to boot. I have several whole house filters set-up and a good softener, just to give some background. The house originally was all copper but I have replaced some of it with cpvc as I've done different projects. About four years ago I replaced the bathroom faucet and both supply lines (copper to cpvc). After about a month, the water developed a bad odor, almost like rotten eggs. Changing filters makes no difference and the odor is not present at any other distribution points. About two months ago I replaced the kitchen faucet and also swapped copper for cpvc in the supply lines. Again, about a month later, the odor. It seems to dissipate after running the water for quite some time, and generally the water to the house is not of the best quality, but I do not get the odor from faucets with copper supply lines. Is there something in cpvc that breaks down? It also appears to be more noticeable in the cold water than in the hot, which would go against conventional thinking. By the way, I've been in plenty of buildings that use either pvc or cpvc and have not witnessed an odor problems with the water, so I'm kind of puzzled.

  2. #2
    That's all folks! Gary Slusser's Avatar
    Join Date
    Aug 2004
    Wherever I park the motorhome.


    You could have a contaminated faucet tip (remove the aerator and drop it into a glass of bleach water), or the pigtails to the faucet may have some rubber in them that contributes to the odor; bacteria is the cause of the odor. You're right, the CPVC is not the cause.

    Your softener or those disposable cartridges could be colonized by bacteria. What type of filters do you have and where are they?

    Quality Water Associates

  3. #3


    I will give that a shot Gary, but I did misrepresent the facts. As I look at the pipes for the bathroom supply line, only the cold water line was replaced withy cpvc, the hot is still copper. The hot doesn't smell, only the cold. Now I'm really confused.


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