Page 1 of 2 12 LastLast
Results 1 to 10 of 13
  1. #1
    Supporting Member
    Join Date
    Jul 2018
    Location
    League City, TX
    Posts
    70
    Post Thanks / Like
    Post Thanks / Like

    RO/DI won't shut off

    Hey everyone, having some issues with my RO/DI not shutting off after reaching full.

    My check valve has failed. It wasn't allowing any water out. I have a new one on the way, but I don't think that would stop it from working. At least based on the videos I've watched about trying to fix it.

    I replaced the ASO thinking that might have failed also, but it still runs even after it's been full for 30 minutes.

    My system is operating around 48psi.

  2. Likes Reefahholic liked this post
  3. #2
    Supporting Member Reefahholic's Avatar
    Join Date
    Feb 2014
    Location
    77573
    Posts
    7,046
    Post Thanks / Like
    Post Thanks / Like
    Quote Originally Posted by Tenny View Post
    Hey everyone, having some issues with my RO/DI not shutting off after reaching full.

    My check valve has failed. It wasn't allowing any water out. I have a new one on the way, but I don't think that would stop it from working. At least based on the videos I've watched about trying to fix it.

    I replaced the ASO thinking that might have failed also, but it still runs even after it's been full for 30 minutes.

    My system is operating around 48psi.
    Id email BRS, they are super helpful. Where did you purchase your unit?

    Or call any RODI vendor.

  4. #3
    Supporting Member
    Join Date
    Jul 2018
    Location
    League City, TX
    Posts
    70
    Post Thanks / Like
    Post Thanks / Like
    Quote Originally Posted by Reefahholic View Post
    I’d email BRS, they are super helpful. Where did you purchase your unit?

    Or call any RODI vendor.
    eBay many years ago.... probably 10-15 years old. Obviously I've been replacing filters and stuff, but otherwise it's been pretty low maintenance.

    BRS has some nice flow restrictors, I may pick one up as the one I have now is the kind that fits in the RO tubing coming out of the membrane.

  5. Likes Reefahholic liked this post
  6. #4
    BOD MEMBER steveb's Avatar
    Join Date
    Jun 2009
    Location
    Spring 77373
    Posts
    7,634
    Post Thanks / Like
    Post Thanks / Like

    RO/DI won't shut off

    Are you talking about shutting a pump off or the water continues to leak past the float valve?

    If its the pump those shut off valves that kill the power to the booster pump usually have a pressure adjustment on them.

    Here is the pressure cut off switch on my Franken Filter..

    Last edited by steveb; 2 Weeks Ago at 03:10 PM.
    Steve
    M.A.R.S.H. - Board Member / Site Admin
    Marine Aquarium and Reef Society of Houston

  7. Likes Reefahholic liked this post
  8. #5
    Supporting Member
    Join Date
    Jul 2018
    Location
    League City, TX
    Posts
    70
    Post Thanks / Like
    Post Thanks / Like
    Quote Originally Posted by steveb View Post
    Are you talking about shutting a pump off or the water continues to leak past the float valve?

    If its the pump those shut off valves that kill the power to the booster pump usually have a pressure adjustment on them.

    Here is the pressure cut off switch on my Franken Filter..

    Nah, I have a setup like this:

    https://www.bulkreefsupply.com/auto-...s-systems.html

    I replaced the 4 hose part. I know the float valve is working properly. Nothing comes out of it after it "closes"

    I have a new check valve coming on tuesday, but from the videos I've watched that won't stop it from stopping.

    When the float valve is "closed" all the water goes out the drain.

  9. Likes Reefahholic liked this post
  10. #6
    Supporting Member Reefahholic's Avatar
    Join Date
    Feb 2014
    Location
    77573
    Posts
    7,046
    Post Thanks / Like
    Post Thanks / Like
    So I run the same shut off valve you do. Your PSI is kinda on the low end, but it should still function ok.

    When you say the float is working properly, and it’s backing the water back down the drain, this makes me think you have a faulty shut off valve. Did you say you replaced it.?

    Either that or you have some hooked up backwards. You said you’ve had the unit for a long time though. I’m assuming this started happening out of the blue.? You haven’t played with the tubing lately or moved things around have you?

    PM @BuckeyeHydro

    Or email:

    mailto:Info@BuckeyeHydro.com

  11. Thanks Tenny thanked for this post
    Likes Tenny liked this post
  12. #7
    MARSH Sponsor Buckeye Hydro's Avatar
    Join Date
    Jul 2003
    Location
    Ohio
    Posts
    710
    Post Thanks / Like
    Post Thanks / Like
    When a hydraulic auto shut off valve stops working, it is one of three things:
    1. The outlet of the system, often a float valve, is leaking. The leak can be very very slow, or
    2. The check valve between the permeate port and the ASOV is no longer working, or
    3. The ASOV itself is bad. Sometimes you can take the ASOV apart and find a debri inside that needs to be removed, or many times the rubber membrane in there is just old and you need a new ASOV.

    Russ
    RO and RODI Systems and Supplies
    www.BuckeyeHydro.com
    Info@BuckeyeHydro.com
    513-312-2343

  13. Thanks Tenny, Reefahholic thanked for this post
    Likes Tenny, Reefahholic, Bigfishy liked this post
  14. #8
    MARSH Sponsor Buckeye Hydro's Avatar
    Join Date
    Jul 2003
    Location
    Ohio
    Posts
    710
    Post Thanks / Like
    Post Thanks / Like
    Quote Originally Posted by Tenny View Post
    My check valve has failed. It wasn't allowing any water out.
    If you're still getting waste water, then the check valve may have failed, but it has fail in that it doesn't seal.
    RO and RODI Systems and Supplies
    www.BuckeyeHydro.com
    Info@BuckeyeHydro.com
    513-312-2343

  15. Thanks Tenny, Reefahholic thanked for this post
    Likes Tenny, Reefahholic liked this post
  16. #9
    Supporting Member Reefahholic's Avatar
    Join Date
    Feb 2014
    Location
    77573
    Posts
    7,046
    Post Thanks / Like
    Post Thanks / Like
    Thanks for the reply. The OP must be at work. :-)

  17. Likes Buckeye Hydro liked this post
  18. #10
    Supporting Member
    Join Date
    Jul 2018
    Location
    League City, TX
    Posts
    70
    Post Thanks / Like
    Post Thanks / Like
    Quote Originally Posted by Buckeye Hydro View Post
    When a hydraulic auto shut off valve stops working, it is one of three things:
    1. The outlet of the system, often a float valve, is leaking. The leak can be very very slow, or
    2. The check valve between the permeate port and the ASOV is no longer working, or
    3. The ASOV itself is bad. Sometimes you can take the ASOV apart and find a debri inside that needs to be removed, or many times the rubber membrane in there is just old and you need a new ASOV.

    Russ
    Quote Originally Posted by Buckeye Hydro View Post
    If you're still getting waste water, then the check valve may have failed, but it has fail in that it doesn't seal.
    Wow didn't realize we had an RO/DI Sponsor, would have bought from you had I known.

    So the ASOV was just replaced (amazon special) but it didn't make a difference. I tried hooking it up with the hoses swapped (still the right flow direction) and no RO comes out at all (which from the video I watched said would happen when you have the wrong hoses in it).

    The check valve was stuck so that no water came out the RO side, it was all rejected water. ( picture of failed check valve ). So I just made it free flowing to test it. I have a new check valve that I need to install (on my list of to do tonight). From the video I was watching earlier it made it seem like if there was no check valve it should still shut off with the ASOV, just there was the potential for water to back flow through the system. So the past few days when I was making water I just turned the ball valve to feed it water and set a timer to turn it off manually.

    The float valve could be bad... the way I tested it was I twisted it upside down and waited a bit to see if the water ever stopped. It didn't seem like any water was getting out but there could have been. The "rejected' water was still coming out at full power. This will be on my list of next things to buy though (from you!) if it doesn't fix itself.

    Quote Originally Posted by Reefahholic View Post
    Thanks for the reply. The OP must be at work. :-)
    Was mid typing a response then work took my attention away.... always getting in the way of stuff!

  19. Likes Reefahholic liked this post

Similar Threads

  1. Shut the F.................
    By Diesel in forum Marine and Reef General Discussion
    Replies: 6
    Last Post: 08-21-2013, 05:26 PM
  2. Auto shut off valve in an RO/DI
    By tang in forum Marine and Reef General Discussion
    Replies: 10
    Last Post: 07-10-2011, 04:27 PM
  3. Diy Ro shut-off Solenoid Valve
    By mike13oy in forum Do-it-Yourself
    Replies: 8
    Last Post: 12-04-2010, 12:03 PM
  4. RODI Leak Detector Shut-Off
    By chadhender in forum Marine and Reef General Discussion
    Replies: 6
    Last Post: 12-09-2008, 06:57 PM
  5. Too shut it down or not?
    By ChrisB in forum Marine and Reef General Discussion
    Replies: 8
    Last Post: 01-27-2005, 01:10 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •