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  1. #21
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    If he can afford a reef tank, surely he can afford to take both of us...

  2. #22
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    Wait......reef tanks are expensive?

    Sure. Take both y'all out for dinner.....my favorite Mexican food restaurant.....Taco Bell.....yummy!!!

  3. #23
    Supporting Member Reefahholic's Avatar
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    At least bring them to Torchy’s Tacos.

  4. #24
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    You know, we pass by Torchys tacos all the time in the ambulance, and even attempted to order, never fails, always get toned out for a call.

  5. #25
    MARSH Sponsor Buckeye Hydro's Avatar
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    Quote Originally Posted by rparker2112 View Post
    I have a BRS 6 stage with booster pump. It's set at 80 psi. My well water is at 900-950 on a normal basis. Coming out of my RO going into my DI is 35-28 TDS depending on my feed TDS. Called BRS and they said the minimum specs on the DOW 75gpd is 96%, which by my calculations in getting about 97% rejection.

    But I made about 60 gallons of DI/0tds water before the resin was spent.

    Before I run it thru RO I gas it off for 2 days, so I know it's not C02.
    Do you have the goofy set up with the two membranes plumbed in series and an undersized flow restrictor?

    Russ
    RO and RODI Systems and Supplies
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  6. #26
    MARSH Sponsor Buckeye Hydro's Avatar
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    My water temp is heated with 100 feet of 3/8 line inside a bucket with a heater. That improved my rejection rate a bit.
    If you make the feedwater warmer, your rejection rate will be WORSE.
    RO and RODI Systems and Supplies
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  8. #27
    Supporting Member Reefahholic's Avatar
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    Quote Originally Posted by Buckeye Hydro View Post
    Do you have the goofy set up with the two membranes plumbed in series and an undersized flow restrictor?

    Russ
    What would be the recommended way to plumb in the two membranes and why would they put an undersized flow restrictor?

  9. #28
    MARSH Sponsor Buckeye Hydro's Avatar
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    Quote Originally Posted by Reefahholic View Post
    What would be the recommended way to plumb in the two membranes and why would they put an undersized flow restrictor?
    The recommended way... depends upon a number of things. But when the quality of the source water is largely unknown, and the source water has very high TDS, and you're talking about a low pressure system, and a system with no autoflush, it surely isn't in series with an undersized (over-restrictive) flow restrictor.

    If you just want water faster, run them in parallel, each with their own properly sized flow restrictor.

    Why would someone use an undersized restrictor? My guess is so they could claim that the system "saves water." If that's the approach, why not tell people to simply spend $4 and put an undersized restrictor on the membrane they already have?
    RO and RODI Systems and Supplies
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  11. #29
    Supporting Member Reefahholic's Avatar
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    Quote Originally Posted by Buckeye Hydro View Post
    The recommended way... depends upon a number of things. But when the quality of the source water is largely unknown, and the source water has very high TDS, and you're talking about a low pressure system, and a system with no autoflush, it surely isn't in series with an undersized (over-restrictive) flow restrictor.

    If you just want water faster, run them in parallel, each with their own properly sized flow restrictor.

    Why would someone use an undersized restrictor? My guess is so they could claim that the system "saves water." If that's the approach, why not tell people to simply spend $4 and put an undersized restrictor on the membrane they already have?

    Well that makes sense! Weird they would do it like that.


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