Black particles in water: Navien tankless water heater to blame?
Comments
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Those particle are very hard to see. Are you sure the particles are only coming from the hot water ?
It could be that the hot water is extracting those black particles out of the water when the water is heated. The thing that I can't tell is how they smear when rubbed.
A few questions.
Have you had your water tested?
Is there a water filter and water conditioner on your water main?
Is this city water or a well?
From what water faucet did you take the sample from?
It could be normal build up coming through your faucets that is built up in the faucet aerators ?
Maybe remove and clean the aerators on your faucets ?
Try draping a white cloth like a handkerchief over a glass and turn the faucet on drawing water through the cloth? Then look at the cloth.
Hope these things help. Please respond back.
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Our local water department changed the disinfectant they add to the water from chlorine to chloramine (a chlorine/ammonia compound). The ammonia breaks down rubber, affecting various parts of a plumbing system (toilet flappers, faucet/water heater connectors, etc.); symptoms are like yours. Chloramine resistant fittings are now available.
What part of the country do you live in? Check with your water department.8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
Hello, If you have any braided stainless flex connectors, they often have a black rubber lining that disintegrates just as you have described. An expansion tank could be another source of rubber too.
Yours, Larry
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Hi cry1130, we have Navien water heater and having the same issue as yours. Can you please help me letting know what the issue was and how it was fixed ? It would be huge help as we are in great stress due to this issue. Thank you.
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Who promoted those chemicals, the local plumbers union?
The insurance companies are going to have a field day. . .or rather a flood day.
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No. The public health people. The objective of the exercise is very simple: keep enough disinfectant active in the system, even at the far ends of the system, to kill any bacteria which might get in there. Such as cholera, typhoid, Legionnaires', assorted other nasties.
Chloramines are one choice. Chlorine (sometimes as a gas, sometimes as sodium hypochlorite) is another. Which to use depends partly on cost, partly on operating safety (chlorine gas is toxic, of course — but sodium hypochlorite is a powerful oxidizer, and is a real fire hazard; chloramines are pretty safe to handle), and partly on source water quality (some source waters react to make bad tastes or odours with chlorine, but not with chloramines).
If there were no possibility of contamination after leaving the treatment plant, then ozone, or ozone in combination with ultraviolet, could be used as a disinfectant. Unfortunately, experience has shown that public water supplies will get contaminated. Not that often, but it does happen, so a residual disinfectant is the only realistic option.
Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0 -
can some please help me with this ? It’s becoming huge issue for us and no one is able to figure out
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Any update ?
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