BrewnWKopperKat
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From the Cali Mountain kit instructions (PDF):Do you still need to de-chlorinate the water?

My understanding is that tannins are extractedI don't know if the relevant tannins survive the boil (or the flash dry).
... from grain husks
... when sparging, steeping, or mashing
... at a high temperature
... with a high water pH
.... and/or with high bicarbonates.
There are no grains (and no grain husks) in these kits.
For other processes that brew with DME / LME and steeping grains, take the time to read chapter 1 of How to Brew, 4e. In the book, Palmer does an excellent job of poka-yoke-ing (error proofing) many common new brewer mistakes.