Black specs from hot water after doing plumbing work - 1 year old AO Smith hot water heater

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TurboMan

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What would cause grimy black specs coming from the hot water side after shutting off the water supply for a short time for plumbing repairs. Every faucet had it for about 1 minute of running after turning back on the water supply. Hot water heater is a 60 gal 1 year old AO Smith. All copper pipes. We do have well water and also have a whole house salt treatment system that I make sure is always filled. The texture of the black grimy stuff is kind of slippery and leaves a trace when you try to wipe it up. It did eventually drain after leaving the water running and as I said the water did go clear after about 1 minute of running.

Done a fair amount of plumbing work and never seen this much stuff come out of the faucets.
 

John Gayewski

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So there was a large amount of this stuff? Most times with black specs people determine it was from a washer on the water heater connectors or washers from other supply hoses. Your description makes it sound like it was more than a washer or two could cause.
 
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