1/4" Auto Shut Off Valve

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1/4" Auto Shut Off Valve

91% Recommend this to a friend (20 of 22)

SKU: 200011
In Stock: 4,175
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Quick Overview

1/4" Automatic shut off valves are used with float valves or pressurized tanks to shut off an Reverse Osmosis system. It utilizes the back pressure created by the float valve or pressurized tank to shut off the water supply to the membrane. Without an automatic shut off valve waste water would continue to run out after the float valve is activated or tank becomes full.


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Installation Instructions


1/4" Automatic shut off valves are used with float valves or pressurized tanks to shut off an RO system. It utilizes the back pressure created by the float valve or pressurized tank to shut off the water supply to the membrane. Without an automatic shut off valve waste water would continue to run out after the float valve is activated or tank becomes full.


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  • did'nt last long By redfelddan on 4/15/2017

    well it lasted about 2 days and 120 gal. of water before it started buzzing like crazy and not shutting
  • great product By reefermatt on 9/14/2015

    Would give it 5 stars if I didn't need to replace so often about once per year. You do need to realize this product is a wear item like the breaks on your car or an oil change . I would be a fan of a repair kit for this valve as the housing never fails only the internals.
  • fixed the leak By polecat on 3/4/2015

    my shutoff valve starting leaking after i added a booster pump ordered a new one and no more leak and my presure is at 90 psi
  • Great Product and Super Fast Delivery By zoolan70 on 12/28/2014

    I ordered one to replace an existing one to try and fix a problem with my RO/DI system. Product arrived in 48 hours!
  • great product By Ol Crusty on 12/26/2014

    This works great is priced right
  • 6 stage would'nt shut off By Capt Dave on 11/19/2014

    R/O kept running,contacted BRS they replaced it. No problems now works perfectly.
  • Good, but no directions. By Ed on 8/30/2014

    This product is competitively priced and works as advertised.

    If you used this for an auto top off reservoir, be sure to turn off the water supply after your reservoir is full, or you will very quickly deplete your DI resin as the valve cycles off and on.

    Also, this part is very difficult to install properly without instructions. BRS could easily include and instruction sheet. By not doing so, the user runs the risk of improperly installing and wasting water and DI resin.
  • excellent By dark moon on 5/26/2014

    great product works very well
  • Great Product By tmf171 on 4/23/2014

    Now I don't need to use 5 gallon buckets and an small pump to get my RODI working. This replaces those things and removes points of failure!
  • my 6 stage deluxe ro/di shutoffs now By saboken on 8/24/2013

    This valve went bad after 1 day BRS sent out a new one after a long wait it seemed like they didn't believe me that it was bad! But they did finally replace it now I can leave the water supply on I was a bit frustrated at first that I had to persist about the issue but I am over it now :) there is so much on my wish list I hope future purchases go better. That's BRS without them I would not find half of what I need locally
  • Good Product but failed after 100 gallons of R/O water output... By Frank Oddo on 4/11/2013

    I have this product installed on a 4 stage R/O DI unit in my basement which is custom piped into my wall in my tank room. The shut off valve has been working fine for the past 80 -100 gallons of fresh RO/DI water production. However, recently I have noticed that my pressure gauges will randomly spike from 0 to 60 PSI, even though my 50 gallon RO/DO storage tank is full and the tank float valve is in the closed position. This results in the unit randomly turning on and off and water trickling out of the waste line for no particular reason... It's clear that I have a faulty valve. andI am hesitant to buy another as I question the longevity of this part...
  • Works great By Devin on 3/1/2013

    Works great, I have mine taking 80 PSI of pressure and it works just right.


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Product Questions

Hello, I have the BRS 5 stage with drinking water add on and premate pump. The waste water constantly is running lately. Would this indicate the pressure switch is failing?
Question by: Erik on Aug 11, 2016 7:32:00 PM
Great question! If your waste water is continuing to run, this would suggest an issue either with the auto shut off valve on your unit, or possibly a lack of sufficient pressure to activate the auto shut off on the line. Assuming you have good pressure, it would be worthwhile looking at replacing the ASOV. If necessary, it is an easy part to replace. :-)
Answer by: Zack (Admin) on Aug 16, 2016 1:44:00 PM
Will this work on the water supply line with the float in a waste water tank. I don't use any electric pumps on my RO system, just a permeate pump. We save the permeate from our system to use around the house. If not are there other options, maybe a solenoid that can shut down the water production when a tank is full.
Question by: John on Jan 18, 2017 12:53:00 PM
Awesome question! This is intended to function with the back pressure built up when the product water line is stopped. On most of our units, this auto shut off comes already installed. Once the reservoir or pressurized drinking water tank is full, back pressure begins to build up in the system. When that back pressure reaches a certain point, this will engage and shut the waste water off as well. It is much like shutting off your kitchen faucet. :-)
Answer by: Randy (Admin) on Jan 20, 2017 9:35:00 AM
When i purchased this the unit came with safety clips for all the mur-lok fittings. I would like to buy to safety clips separately for all my other mur-lok fittings. Can you get bags of these in 1/4, 3/8, 1/2 sizes? (pretty mediocre question ;) )
Question by: thomas allison on Jun 12, 2016 4:17:00 PM
Hey there!
I have included the link below for the tube clips to hold in the tubing. these are sold individually in 1/4" and 1/2" sizes. Feel free to let us know if you have any further questions.
Answer by: Connor (Admin) on Jun 14, 2016 6:43:00 PM
I have had my custom system for 5 years now. Used for drinking and saltwater mix. Seems lately the auto shut off wont shut off. Tried cleaning it, didnt help. My question is would i be better off buying another autoff valve or a permeate pump or both?
Question by: Joey on Jul 19, 2014 1:19:00 PM
If you have a pressurized storage tank I would just pick up the permeate pump. It is going to save you a lot of waste water and will pack more water into the tank!
Answer by: Bulk Reef Supply on Jul 19, 2014 1:19:00 PM
I have te typhoon III EXTREME from air water ice and my auto top off seems to be working fine, but the waist water doesn't ever shut off. My reservoir bucket turns off perfectly.Could it be the auto shut off? Do they go bad after a few years?
Question by: Mike on Oct 29, 2013 6:39:00 AM
Hey Mike,
There isn't much to go wrong with an auto shut off valve so it doesn't happen very often. Normal auto shut offs work by turning off the supply water when the product water line builds up enough pressure. If its not turning off, its usually because the product water line isn't building up enough pressure so its a matter of finding out why. The most common reason is just that the filters have become clogged and the unit just can't built up the pressure effectively, but its also worth checking and making sure that you don't have a small leak anywhere on the product line or something to that effect as well :-)
Answer by: Bulk Reef Supply on Oct 29, 2013 6:39:00 AM