I have a modern boiler fitted and very soon My hot hose turns white. Is this common ? Do you hold this problem ?.? ...

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Answers:    It is because there are still nouns in the river pipe. After you run though the water for few cycles, the hose will be clear.
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Nope, thats not normal. Sometimes you stipulation to flush the pipes for a while after having work done. I have white water when I replaced a faucet. I moved out it running for a while and it went away. Probably longer for a boiler.