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APEC WATER

APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch

  • Based on 914 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Oct 12
Order within 3 hours and 47 minutes
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Features

  • Automatic Shut Off Valve for APEC Reverse Osmosis Systems Model RO-45, RO-90,RO-PH90,ROES-50,ROES-PH75,ROES-UV75.
  • 1/4 inch Quick Connect
  • Light Weight,Easy Install and unload
  • Compatible with most Reverse Osmosis systems

Description

A Legacy of Excellence in Water Filtration For over 20 years, APEC Water Systems has been a trusted leader in high-quality water filtration. Built on innovation, science, and sustainability, we ensure pure, safe, and great-tasting water. Our advanced reverse osmosis and whole-house filtration systems meet the highest standards for performance and reliability. Join millions who trust APEC for better water, better living. Featured with 1/4" quick-connect fittings, this auto shut off valve can be easily connected and disconnected to your system. You can simply plug or unplug the tubing. This light weight but durable shut off valve is made of certified material for long-lasting performance and leak-free experience. It can be used on all APEC RO systems or most other reverse osmosis systems with 1/4" tubing.

Material: Plastic


Brand: APEC WATER


Item dimensions L x W x H: 6.1 x 3.15 x 1.81 inches


Exterior Finish: Plastic


Inlet Connection Size: 0.25 inches


Inlet Connection Type: Quick Connect


Outlet Connection Type: Quick Connect


Maximum Operating Pressure: 85 psi


Number of Ports: 2


Outlet Connection Size: 0.25 inches


Brand Name: APEC WATER


Model Number: ASO


Number of Packs: 1


Unit Count: 1 Count


Item Highlight: Automatic Shut Off for APEC RO Systems, 1 Unit, Quick Connect, Lightweight, Easy Installation


Manufacturer: APEC Water Systems


Number of Items: 1


UPC: 851001007402


Included Components: ASO


Item Type Name: Auto Shut-Off Valve


Item Weight: 1.76 ounces


Number of Pieces: 1


Manufacturer Part Number: ASO


Exterior Finish: Plastic


Inlet Connection Type: Quick Connect


Outlet Connection Type: Quick Connect


Maximum Pressure: 85 psi


Number of Ports: 2


Valve Type: Automatic Shut Off Valve


Item Dimensions: 6.1 x 3.15 x 1.81 inches


Inlet Connection Size: 0.25 inches


Outlet Connection Size: 0.25 inches


Size: 0.25 Inch


Material Type: Plastic


Specification Met: NSF


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 12

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Relatively Quick Fix to an Annoying RO System Problem
So far so good. I have a GE Smartwater RO system and after changing the filters and membrane, noticed that the water pressure coming out of the RO faucet would come out strong for the first few 5 seconds, then diminish quickly and continue to diminish until barely coming out. Then, after I turned the faucet back off, you could hear the drain line run for 20-30 minutes afterwards. After some initial research, I took off the check valve and could blow air (by mouth), both directions which is an indication that it is no longer working as it is only supposed to allow passage one way. So I ordered and replaced that part but the problem was still there. So, I bought this ASO valve and replaced my old one. My old one had threaded male parts but I'm a big fan of these quick connects. Was a little difficult to get to the old ASO valve as a couple of the tubes connected to it were very short. I had to undo one of them in order to move the old ASO valve down so I could get to it. If you have easy access to your ASO valve, the change should probably be less than 5 minutes. Anyway, I matched up the "IN" and "OUT" with the old one and switched them out. Put everything back, turned the water back on and tested for leaks...No leaks! Phase 1 complete! Now to test the water pressure out of the RO faucet...Strong and continued pressure!! AND, no water going down the drain tube afterwards. Success. Poured myself a tall glass of water to celebrate. OK, not really. Poured myself a bourbon but if i WANTED to, I could've poured a tall glass of water. :) ... show more
Reviewed in the United States on September 19, 2017 by Rodriguez
    • Great
Works as expected
Reviewed in the United States on June 15, 2026 by L. Sue
    • Easy part to change, saving water now.
RO system, Thank you thank you thank you!!!!! This stopped a small trickle of water through my water meter which was the answer to the puzzle I have been seeking for a year and 1/2. I thought it was a couple of other leaks I had found and fixed, but still the meter registered as moving. I never dreamed it was the water system. This part was original and 24 yr.s old. In turning off the water under the sink to change the last filter, I noticed the meter stopped. So I was thrilled to finally solve the on going problem and mystery, It costs a lot of money to hire a leak detecting company, so I figured I would eventually figure it out, and bingo this was it. So happy Amazon had the right part. It has been a process of elemination to accidentally run across this last piece of the puzzle since I did not know what this part did on the unit, but water was not going through the system after changing all the filters one by one, it came down to the shut off valve, the part I dreaded most on changing since it looked ominice and scary, but now I know all about the dreaded chore of changing everything on the unit and what they all do. I always wanted to ignore and out of sight out of mind when it came to this hard to get to and hard to undo to redo everything on this complex system. It takes alot of muscle as well as patience. I can now breath a sigh of relief, and feel a sense of accomplishment. This part which was the scariest ended up being the easiest of all the parts to change and now my 24 yr. old unit is like new again. I hope this helps someone else with the same problem, you live and learn. I will now be changing the filters more often since this experiance. Thanks again for having the parts I needed. ... show more
Reviewed in the United States on May 31, 2024 by Amazon Customer
    • Working so on Watts Pure H20 RO System
Rating 4 stars for now because it's low cost and appears to be functioning as intended, though I just installed it yesterday. My Watts Pure H20 system has been running non-stop for several months and I noticed a big increase in my water bill. Turns out the automatic shutoff valve that got cracked during installation is a critical component of the system (I had been running without one). The installation instructions that came with this valve are worthless. After extensive searching on the internet I think I figured out how to install on my system. There is a high pressure side of on the top of the unit that is marked with "in" and "out" indications. The opposite side with screws is the low pressure side. Plug the green water supply line into the "in" port of the high pressure side, while the green line to the RO unit goes to the "out" port of this side. Then plug the blue water storage tank line into the "out" port of the low pressure side while the blue line going from the tank to the RO unit goes to the "in" port. This configuration appears to be working as the gurgling sound has stopped after the tank pressurized. ... show more
Reviewed in the United States on December 16, 2020 by R. Claghorn
    • Actually seems to hold up!
I've had several of these that look the same but usually fail in a few months. This one has been in use for over a year and still works perfectly.
Reviewed in the United States on September 17, 2026 by KOKing
    • Works well
Perfect function
Reviewed in the United States on August 22, 2026 by Stephanie Link
    • Perfect Replacement for Watts Premier RO Pure System
Had water constantly dripping down the drain from my Watts Premier RO Pure System. Did some research and thought I would need to replace the auto shut-off (ASO) valve. When I went to the Watts Premier site to order one, though, they were out of stock. Called Watts Premier support (which is always great), and they confirmed they were out of stock. After some questioning, they said I could substitute one if it was an APEC brand. While on the phone, though, they had me turn off the tank valve, and the dripping stopped immediately, so they told me I didn't need the valve but needed to repressurize the tank. After doing that, all seemed fine for a few months, but then it started again. In the meantime, I'd ordered this valve just in case, so when I noticed the problem again, I went ahead and installed it. Seems to be working perfectly now. The valve came with installation instructions and was a breeze to replace. The only difference between the original ASO and this one seems to be color. Glad I had it on hand when I needed it. ... show more
Reviewed in the United States on March 16, 2019 by Richard Levine
    • Ordered Two, both DOA
Had our USA advertised Apec reverse osmosis water filter for over 26 yrs now. Great system, we use and recommend these for all consumable water needs. The weakest part of these systems is the auto-shut off valve the system needs to dispose of the filtered out waste-water while re-filling the RO supply tank. When this usually long-lasting auto shut off valve finally fails and starts leaking, you will lose unnecessary pricy water down the drain. Valves are easy to replace when the need does occur. Which valves have we had the best luck with over a quarter century? Have purchased 3 Apec label $10 apiece valves and also tried 2 orders of the two valves for $7-9 bucks cheaper priced ones just to have reserves on hand (we are rural). Have had one DOA valve of the cheaper “2 for 1” cheaper variety. Still have 1 of those “cheapy’s” in storage for later needs. Worst luck has been with the more expensive Apec brand. Two arrived DOA, one lasted less than 3 months. If you look at the Apec model specs, you will see it is too made in China. Perhaps both valves come out of the same shipping door and our luck is just the normal coin toss of someone’s poor quality control? Side note, two of our previously lost non-Apec cheapy valves we damaged/fouled ourselves plunging the drain without first disconnecting the RO unit’s 1/4” drain pipe tube..And if you are wondering, we do check and maintain house water pressure at 50 psi. ... show more
Reviewed in the United States on December 13, 2023 by The May;s, Red Bluff Tx

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