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Marine Aquarium Society of Ventura County

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2 posters

    Back flushing a RO unit

    Crusty Old Shellback
    Crusty Old Shellback
    Crusty Old Shellback
    Charter Member


    Posts : 684
    Join date : 2011-07-27
    Location : Oxnard
    • Post n°1

    Back flushing a RO unit Empty Back flushing a RO unit

    Post by Crusty Old Shellback Wed Mar 27, 2013 9:34 am

    Hey guys, does anyone have a diagram or have a set up on their RO system for a back flush?

    I've got a basic idea of how to do one but just wante dto see if anyone has bought one from a manufacture to see if I'm doing something wrong.

    I'm getting ready to purchase a new RO/DI unit and plan on plumbing in a back flush this time.
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    dwolson2
    dwolson2
    dwolson2
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    Posts : 2356
    Join date : 2011-08-07
    Location : Where ever I am told to go
    • Post n°2

    Back flushing a RO unit Empty Re: Back flushing a RO unit

    Post by dwolson2 Wed Mar 27, 2013 10:21 am

    It's not a back flush, just a flush. It bypasses the restriction on the end of the ro. I have one on mine. If the tds gets high(7-10) I'll flush it and it will go down to 4 or 5. Some systems automatically flush a min every hour.
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    Crusty Old Shellback
    Crusty Old Shellback
    Crusty Old Shellback
    Charter Member


    Posts : 684
    Join date : 2011-07-27
    Location : Oxnard
    • Post n°3

    Back flushing a RO unit Empty Re: Back flushing a RO unit

    Post by Crusty Old Shellback Wed Mar 27, 2013 1:52 pm

    So your saying all it is is a bypass for the waste water restrictor?
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    Crusty Old Shellback
    Crusty Old Shellback
    Crusty Old Shellback
    Charter Member


    Posts : 684
    Join date : 2011-07-27
    Location : Oxnard
    • Post n°4

    Back flushing a RO unit Empty Re: Back flushing a RO unit

    Post by Crusty Old Shellback Wed Mar 27, 2013 4:06 pm

    OK, just did a quick search and see that it is indeed as you say, just bypass the restrictor. I thought I had remembered from years ago of a back flush system. At least that's the way I had been doing mine, moving the input line to the waste line output and leaving the input line open, a reverse flush, but I guess that is not needed now, just a quick open flush after making water.
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    dwolson2
    dwolson2
    dwolson2
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    • Post n°5

    Back flushing a RO unit Empty Re: Back flushing a RO unit

    Post by dwolson2 Wed Mar 27, 2013 4:19 pm

    I've heard it called a backflush before, but when I looked at how it was accomplshed, its not one. No worries. its very easy to install one on a previous RODI. Just add 2-y's with a valve parallel to the restrictor.
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    Crusty Old Shellback
    Crusty Old Shellback
    Crusty Old Shellback
    Charter Member


    Posts : 684
    Join date : 2011-07-27
    Location : Oxnard
    • Post n°6

    Back flushing a RO unit Empty Re: Back flushing a RO unit

    Post by Crusty Old Shellback Thu Mar 28, 2013 9:23 am

    Or add a T and a valve before the restrictor. Wink Remember mines out side and just drains into the yard so no need for fancy stuff. Smile
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    dwolson2
    dwolson2
    dwolson2
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    Posts : 2356
    Join date : 2011-08-07
    Location : Where ever I am told to go
    • Post n°7

    Back flushing a RO unit Empty Re: Back flushing a RO unit

    Post by dwolson2 Thu Mar 28, 2013 9:25 am

    Lol. I was trying to get the most flow performance for you. Its a carefully regulated performance with a T vs a Y....lol
    Yea a T would work fine, mine just has a Y Smile
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    • Post n°8

    Back flushing a RO unit Empty Re: Back flushing a RO unit

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