APEC Water Systems Auto Shut Off Valve Replacement Part (ASO)

Easy installation, functioned properly

There are many choices for this item. This one works much better than the previous replacement. Good flow, good tank refill control, looks solid and not cheaply made.

Good price and good product

I can confirm this ASO valve is a suitable replacement for 1/4" tubing ASO valve used in the Watts 4 stage RO filtration system. After installing the replacement I learned some tips for those who wanted to save a little money by using a "non-standard" or "off brand" replacement part for ANY RO system.1. Ensure correct tubing size. Make sure you know the correct tubing size for the feed lines in your RO system. This product is compatible with 1/4" tubing only.2. Install ASO Valve correctly. If you, like me, are installing this ASO valve as a replacement in a NON APEC RO system, the color coding with the ports may not match. The blue collet on the "in" side of the ASO valve connects to your COLD WATER SUPPLY. The white port connects to your RO Tank. From there it's simple to connect the "out" side keeping the tube color pattern consistent.3. Check ASO Valve function. After you have turned the water supply back on, you will probably hear the system functioning and also that draining sound which may have started you down this path to begin with. TAKE HEART! Here's what you do: SHUT OFF THE TANK VALVE AND WAIT 5-10 MINS! If the ASO valve is installed correctly and there are no other problems with your system, the ASO valve should engage once the correct pressure is reached in the system and the water will stop draining.REMEMBER, THE SYSTEM WILL NEED TO PRESSURIZE BEFORE THE ASO VALVE WILL FUNCTION! THIS CAN TAKE 5-10 MINUTES.IF, AFTER 5-10 MINS, THE WATER CONTINUES TO DRAIN, THE VALVE MAY BE FAULTY OR THERE IS ANOTHER REASON YOUR RO SYSTEM IS NOT REACHING ADEQUATE PRESSURE!The main take away is, once you install the ASO valve, the system will need to re-pressurize before it will stop draining and that can take 5-10 mins. Do not expect the water to stop draining immediately. Also, if your RO tank has inadequate pressure it may need to be re-pressurized. When the tank is full of water, it should read at least 40 psi.Hope this helps!

RO system, Thank you thank you thank you!!!!! This stopped a small trickle of water through my water meterwhich 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.

Exactly what I needed when R/O system suddenly stopped providing water. Easy to install. Small price to pay for an invaluable part to the filter system.

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.

I bought this to replace the failed ASV in my Watts Premier system purchased from Costco a few years ago. Diagnosing that this was the failure was the last on my list unfortunately, but this fixed the issue perfectly and fit exactly like the original. I'll update my review if it doesn't last for some reason. Sure was cheaper than getting the OEM one, too, and the only difference seems to be that this one is white and the OEM was black. The instructions with this one are not very applicable to the WATTS system, so just replace the lines one at a time while keeping the valves positioned the same and all will be well. Replacement should only take a few mins and is entirely tool-less.

Replacement for a cracked unit. Works well so far. Its a push fit for the tube.