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  1. The Bru'n Water website has a Water Knowledge...

    The Bru'n Water website has a Water Knowledge page that happens to have that equation.
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    Yep, the hardness and iron could play havoc with...

    Yep, the hardness and iron could play havoc with the membrane, so ion-exchange is highly advised prior to RO treatment. That water has a decent percentage of temporary hardness and you would be able...
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    You didn't mention what your existing sodium...

    You didn't mention what your existing sodium level. I find that raising sodium into the 30 to 50 ppm range is fairly innocuous to flavor. Table salt should be on your list.
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    With an easy to disassemble tri-clamp, I'd say...

    With an easy to disassemble tri-clamp, I'd say that you should plan on disassembling when the tank is empty and cleaning that rotating connection and swabbing or brushing the tubing. It shouldn't...
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    It also depends on how the kettle is heated....

    It also depends on how the kettle is heated. There is not really a reason why that would create a code violation if the kettle is steam or electric heated. Foam or batting wrapped around the kettle...
  6. At those flow rates, its likely that you'll be...

    At those flow rates, its likely that you'll be needing a fairly large carbon filter to produce the necessary residence time in the filter to remove the offending compounds. Of course, that assumes...
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    By the way if you were brewing with low...

    By the way if you were brewing with low alkalinity water, it is wise to supply sufficient alkalinity to the mashing water so that the pH doesn't drop too low when brewing dark styles. In that case,...
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    At that pH, there are at least a couple options...

    At that pH, there are at least a couple options for raising pH: Baking soda and chalk. Either are suitable and can be added dry to the beer. However that introduces an infection risk, but as already...
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    Element sizing and numbers are based on basic...

    Element sizing and numbers are based on basic energy input. This matters more with respect to the time needed to raise the wort temperature to boil. Once the wort is boiling, it is likely that much...
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    When your water supply is a well, consistent...

    When your water supply is a well, consistent water quality is almost a given. Do not employ RO to provide 'consistency'. That would be a serious expense and waste.

    390 ppm TDS is not excessive...
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    Biologic growth is not a significant concern with...

    Biologic growth is not a significant concern with RO. There aren't enough "building blocks of life" (nutrients) in that water to foster growth. If the vessel is covered or sealed, then you won't have...
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    A TDS meter is a dead-simple unit. There are...

    A TDS meter is a dead-simple unit. There are units that are much less expensive than the one you cite.

    True accuracy with a TDS meter is not possible and no amount of spending will make it 'more...
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    If you're just measuring water volume, a...

    If you're just measuring water volume, a totalizer (like on a house water meter), is very accurate and reliable. The nutating disc technology is tried and true.
  14. While malt contributes huge amounts of potassium...

    While malt contributes huge amounts of potassium and magnesium to wort, those malt derived components are different from those contributed by the water. I've heard of several brewers complaining...
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    I have used S-05 in Berliner Weisse's and found...

    I have used S-05 in Berliner Weisse's and found that it performed reasonably well, even when the soured wort was in the 3.0 to 3.1 range. I've since found that that pH range is too low for a...
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    Nope. The only calibration solutions needed in a...

    Nope. The only calibration solutions needed in a brewery are the 7 and 4 solutions and neither of them suffer from short exposure to air. The 10 solution and other alkaline solutions like lye and...
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    pH Meters should be calibrated at least once on...

    pH Meters should be calibrated at least once on each brew day. Those 500 ml bottles of calibration solution should get used up in a reasonable amount of time and avoid expiration with that...
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    How old are your pH calibration solutions? Have...

    How old are your pH calibration solutions? Have you performed a stability test on the pH meter and probe.

    The alkalinity level in that water isn't extreme and it should not take a lot of acid to...
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    The softness or hardness of water has only minor...

    The softness or hardness of water has only minor influence on the need for acid in brewing. Alkalinity is the main influence on acid demand.

    For the alkalinity that you're dealing with, Lactic...
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    I find that the flavor contributed by Roast...

    I find that the flavor contributed by Roast Barley is far superior to Black Patent. In addition, if your mashing water has insufficient alkalinity, the presence of those roast grains can drive pH...
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    Water with very low TDS (like RO water), gives pH...

    Water with very low TDS (like RO water), gives pH meters difficulty in measurement. I'm not really surprised that the pH reading is varying. But a more important fact is that the pH of your water...
  22. Bacteria in hot-side water is not necessarily...

    Bacteria in hot-side water is not necessarily detrimental to brewing. But the fact that your RO water is presenting and supporting bacteria, is troubling. That suggests that your water source...
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    If you weren't monitoring the head drop across...

    If you weren't monitoring the head drop across your mash bed while you were pumping, its quite possible that you were pumping at too high a rate. In general, you don't want to impress a head drop of...
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    It's not an insane amount of dissolved solids in...

    It's not an insane amount of dissolved solids in that water, but its pretty close. You should be able to produce a few styles with success, but the level of mineralization is going to make it tough...
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    Even with a 10 bbl brewhouse, I expect that you...

    Even with a 10 bbl brewhouse, I expect that you could get by with a modest RO system and storage tank to provide dilution water for styles that would benefit from that. But for many styles, your...
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