Bulk Reef Supply

Auto Shut Off Kit for Reverse Osmosis Systems

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All Bulk Reef Supply RODI units come pre-installed with an Auto Shut Off Valve and check elbow. If you wish to add a float valve to your BRS RODI system, just purchase a float valve separately and connect it to your product water line. 

Standard Float Valve

Adjustable Float Valve


Auto shut off valves (ASOV) are great for reverse osmosis systems and will allow your RO system to automatically turn on and off based on the activation of a float valve. ASOVs do require a minimum of 40 PSI to operate correctly and can be installed on any style of reverse osmosis system that uses 1/4" tubing.


Auto Shut Off Kit Includes:

  • Float valve
  • 5ft of tube
  • Inline check valve
  • 1/4" auto shut off valve


Auto Shut Off Valve Installation Instructions

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Product Questions

I have a Apex solenoid to turn ATO on 10 minutes every hour to replace evaporation. Sometimes I notice this valve tends to make a squeal as the float barely opens and closes in the sump. is this valve designed for the constant on/off of ATO replenishment? Or should I install a pressure bladder tank?
Question by: Matt on Jun 1, 2016, 9:54 PM
Great question!
The Float Valve in conjunction with auto shut off and check valve (Other two items already built into the BRS RO/DI systems) will work to turn the water to the RO unit on and off as the float is lowered and raised. This will always keep the water at the same level and has some strain on the RO/DI as the water will constantly be turning on and off through out the day. A pressure tank can certainly work as well to store larger amounts of water on hand and not have the same strain on the RO membrane.
Answer by: Connor on Jun 2, 2016, 11:16 AM
I purchased the six stage RODI but I don't see any instruction on how to install the auto shut off. I'm new to this can someone help?
Question by: Money on May 23, 2016, 8:51 PM
Great question! All our our BRS RO/RODI systems come with the auto shutoff valve pre-installed, all you will need to do to enable auto shutoff function is connect the product water line to a float valve.
Answer by: Carter on May 25, 2016, 3:57 PM
I have a BRS RODI system already, so I think I just need the shutoff valve. However, is there a way to set this up so I can install it on a my trashcan, and then disconnect this and the water line easily? I make the water in a back of the house bathroom then wheel it over to the tank.
Question by: Richard on Feb 8, 2016, 8:56 AM
Great question!
You will want to install the float valve in the trash can. We recommend then using a John Guest 3 way ball valve which would be attached to the same product water line to divert the flow from either the trash can or to another area! This way you will not need to disconnect the line.
Answer by: Connor on Feb 10, 2016, 5:38 PM
Hi I want an a float valve for my trash bin that I make my RODI water in, which product would you suggest I
get so that my RODI water does not over flow thanks Nick.
Question by: Nick on Jun 16, 2014, 9:33 AM
Hey Nick,
This kit would be exactly what your looking for. The only extra consideration is making sure your system doesn't already have an auto shut off valve (as many do). If it happens to be that you have a system that has the shut off valve built in (like all of ours except the space saver) then all you would need is just the float valve itself.
Answer by: Bulk Reef Supply on Jun 16, 2014, 9:33 AM
Would there be a way to install this so that water stops running though the whole system when my reservoir is full? On my system at home the water keeps running and I would like to set this up on a customers tank so that he can use it for both water changes and for ato with out using up his filter media too fast.
Question by: Parker on Apr 8, 2014, 3:05 PM
Hi Parker,
If you have an auto shut off kit installed (not just a float valve) then water would stop running through the entire unit when the reservoir is full.
Answer by: Bulk Reef Supply on Apr 8, 2014, 3:05 PM
How do you install this on a r/o system. There is no diretions
Question by: Dave on Mar 16, 2014, 3:36 PM
Hey Dave,
The instructions for these are in video form and can be found right here:
Answer by: Bulk Reef Supply on Mar 16, 2014, 3:36 PM
I have a float valve on my water barrel and a pressure switch inline to shut the ro pump off, Do also need an auto shutoff on my system to? Thank you, Barry
Question by: Barry harris on Feb 8, 2014, 3:09 AM
Hi Barry,
You would also want the auto shut off to turn off the RO/DI unit itself when the tank is full, otherwise you will just be running water down the drain!
Answer by: Bulk Reef Supply on Feb 8, 2014, 3:09 AM
Should the shutoff valve be installed before or after the de-ionization stage? The video I found stated that it should go after the RO membrane on the clean water output, but that didn't seem to allow for the de-ionizer....
Question by: Keith on Oct 16, 2013, 6:13 PM
Hey Keith,
That is correct, after the RO membrane and if you have a DI unit that would be before the DI canister. After going to the ASOV then the water would go on to the DI cartridge.
Answer by: Bulk Reef Supply on Oct 16, 2013, 6:13 PM
Is this kit included with the deluxe reverse osmosis system?
Question by: mike on Sep 28, 2013, 2:20 AM
Hey Mike,
If you ordered one of the 6 stage deluxe models then everything in this kit would already be included. Any of our other RO units would include everything except the float valve, so you would need just the float valve with the other units.
Answer by: Bulk Reef Supply on Sep 28, 2013, 2:20 AM