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Please forgive the length of this post, but I must provide all the information to fully explain the issue. I am completely perplexed! My 43 year oldhome is in the country, on a well. Recently, I had a 20+ year old 40 gallon propane hot water heater professionally replaced. The house service line is double filtered with an inline water softener, and, unfiltered, the water coming from the well is crystal clear. Inside the house, on the cold water side, each faucet throughout the house delivers crystal clear water. The hot water side, at every faucet, is delivering what is seen in the attached photo. It clogs up the aerators and the shower handle control cartridge with small thin, flat, dark flakes and reduced the flow to a trickle. I attached a garden hose to the new water heater drain, opened the line for a short time and the water ran clear. The home plumbing is CPVC. Has anyone seen this problem before? If so, what was found to be the culprit? Thank you, in advance, for any help you can provide.

All too often I see plumbers and homeowners over using hydraulic cement. Perhaps this new heater is lined with hydraulic cement. Maybe open up the heater and inspect it for a cement lining.
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