---
product_id: 441807347
title: "APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch"
brand: "apec water"
price: "Bs.62"
currency: BOB
in_stock: false
reviews_count: 5
category: "Apec Water"
url: https://www.desertcart.bo/products/441807347-apec-water-aso-auto-shut-off-valve-replacement-part-0
store_origin: BO
region: Bolivia
---

# Auto shut-off at 65% tank pressure Lightweight & easy install 0.25 inch quick connect precision APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch

**Brand:** apec water
**Price:** Bs.62
**Availability:** ❌ Out of Stock

## Summary

> 💧 Stop wasting water, start saving smart with APEC’s Auto Shut-Off Valve!

## Quick Answers

- **What is this?** APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch by apec water
- **How much does it cost?** Bs.62 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/441807347-apec-water-aso-auto-shut-off-valve-replacement-part-0)

## Best For

- apec water enthusiasts

## Why This Product

- Trusted apec water brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable & Reliable:** Built to withstand up to 85 PSI, ensuring long-lasting performance and peace of mind
- • **Effortless Installation:** Lightweight design and quick connect ports make setup a breeze—no plumber needed
- • **Precision Quick Connect:** Seamlessly fits 1/4 inch RO systems for hassle-free upgrades
- • **Universal Compatibility:** Works flawlessly with top APEC RO models like RO-45, RO-90, and more
- • **Smart Water Conservation:** Automatically stops water flow to prevent waste and protect your system

## Overview

The APEC Water ASO Auto Shut Off Valve is a 0.25 inch quick connect valve designed for APEC reverse osmosis systems. It automatically halts water flow when tank pressure hits 65% of supply pressure, preventing water waste and system wear. Lightweight and easy to install, it supports pressures up to 85 PSI and is compatible with multiple APEC RO models, making it an essential upgrade for efficient, eco-conscious water filtration.

## Description

This 1/4 in. Quick Connect ASO valve allows your system to turn off the water supply when the tank pressure reaches approximately 65% of the supply water pressure. Without the auto shut-off valve, water will rush through the system wearing down components and sending purified water down the drain after the tank is filled. It is compatible with APEC under-sink reverse osmosis systems.

Review: 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. :)
Review: Great - Works as expected

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01IE3591Y |
| Brand | APEC WATER |
| Brand Name | APEC WATER |
| Connector Type | Compression |
| Country of Publication | USA |
| Customer Reviews | 4.5 out of 5 stars 885 Reviews |
| Exterior Finish | Plastic |
| Included Components | ASO |
| Inlet Connection Size | 0.25 Inches |
| Inlet Connection Type | Compression |
| Item Dimensions | 15.5 x 8 x 4.6 Centimeters |
| Item Highlight | Automatic Shut Off for APEC RO Systems, 1 Unit, Quick Connect, Lightweight, Easy Installation |
| Item Type Name | Auto Shut-Off Valve |
| Item Weight | 50 g |
| Item dimensions L x W x H | 15.5 x 8 x 4.6 Centimeters |
| Manufacturer | APEC Water Systems |
| Manufacturer Part Number | ASO |
| Material | Plastic |
| Material Type | Plastic |
| Maximum Pressure | 85 Pound per Square Inch |
| Model Number | ASO |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 0.25 Inches |
| Outlet Connection Type | Quick Connect |
| Size | 0.25 Inch |
| Specification Met | NEMA |
| Thread Size | 1/4 inch |
| Thread Type | NPT |
| UPC | 851001007402 |
| Unit Count | 1.0 Count |
| Valve Type | shut off valve |

## Product Details

- **Brand:** APEC WATER
- **Exterior Finish:** Plastic
- **Inlet Connection Size:** 0.25 Inches
- **Inlet Connection Type:** Compression
- **Item dimensions L x W x H:** 15.5 x 8 x 4.6 Centimeters
- **Material:** Plastic
- **Maximum Operating Pressure:** 85 Pound per Square Inch
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.25 Inches
- **Outlet Connection Type:** Quick Connect

## Images

![APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch - Image 1](https://m.media-amazon.com/images/I/61hY-nV3IhL.jpg)
![APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch - Image 2](https://m.media-amazon.com/images/I/71c+39GMpiL.jpg)
![APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch - Image 3](https://m.media-amazon.com/images/I/71klb8y5+KL.jpg)
![APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch - Image 4](https://m.media-amazon.com/images/I/71qiqUlCjnL.jpg)
![APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch - Image 5](https://m.media-amazon.com/images/I/81rAHTLu7VL.jpg)

## Questions & Answers

**Q: Apec: is a 90% pressure aso valve available (to use with permeate pump)?  my pressure is below the minimum for my ice maker with this 65% valve.**
A: call APEC they are fantastic at helping with any problem.

**Q: My Nu aqua stage 6 motor keeps running**
A: Booster pump and/or the RO system producing water should never run all the time so I would replace the ASO valve.

**Q: Would this work with watts premier system?**
A: Yes. I am using this on a Watts Premier system

**Q: at what prssure will this shut off?**
A: It is designed to shut off at around 50-60% of your inlet water pressure.  If you need further assistance, feel free to contact us directly by calling 1-800-880-4808 or e-mailing us at info@apecwater.com. We are in the office from Monday-Friday from 8:00am-5:30pm PST. Best Regards, APEC Customer Service

## Customer Reviews

### ⭐⭐⭐⭐⭐ Relatively Quick Fix to an Annoying RO System Problem
*by R***Z on 19 September 2017*

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. :)

### ⭐⭐⭐⭐⭐ Great
*by L***E on 15 June 2026*

Works as expected

### ⭐⭐⭐⭐⭐ Easy part to change, saving water now.
*by A***R on 31 May 2024*

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.

## Frequently Bought Together

- APEC Water Systems Auto Shut Off Valve Replacement Part (ASO)
- APEC Water Systems 1/4" Quick Connect Check Valve Replacement Part (Check-VAL)
- APEC ESSENCE Series 50 GPD Complete Replacement Filter For Undersink System(FILTER-MAX-ES50)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.bo/products/441807347-apec-water-aso-auto-shut-off-valve-replacement-part-0](https://www.desertcart.bo/products/441807347-apec-water-aso-auto-shut-off-valve-replacement-part-0)

---

*Product available on Desertcart Bolivia*
*Store origin: BO*
*Last updated: 2026-10-07*