---
product_id: 31132819
title: "APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch"
brand: "apec water"
price: "NT$817"
currency: TWD
in_stock: true
reviews_count: 8
category: "Apec Water"
url: https://www.desertcart.tw/products/31132819-apec-water-aso-auto-shut-off-valve-replacement-part-0
store_origin: TW
region: Taiwan
---

# Automatic shut off for RO systems 0.25 inch quick connect Lightweight & easy install APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch

**Brand:** apec water
**Price:** NT$817
**Availability:** ✅ In Stock

## Summary

> 💧 Stay in control with effortless water flow management

## 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?** NT$817 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/31132819-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

- • **Featherlight Design:** Ultra-lightweight plastic build means no extra bulk or strain
- • **Smart Auto Shut Off:** Protect your system with automatic water flow control
- • **Seamless Quick Connect:** Snap in place with 0.25 inch fittings for hassle-free setup
- • **Universal Compatibility:** Fits top APEC RO models like RO-45, RO-90, ROES-UV75 effortlessly
- • **NSF Certified Reliability:** Built to meet strict safety and quality standards for peace of mind

## Overview

The APEC Water ASO Auto Shut Off Valve is a lightweight, 0.25 inch quick connect replacement part designed for seamless integration with popular APEC reverse osmosis systems. It automatically stops water flow to protect your filtration setup, ensuring efficient operation and easy installation. Certified to NSF standards, this valve combines reliability with user-friendly design, making it a must-have upgrade for maintaining pristine water quality.

## Description

desertcart.com: APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch | Automatic Shut Off for APEC RO Systems, 1 Unit, Quick Connect, Lightweight, Easy Installation : Tools & Home Improvement

Review: Great - Works as expected
Review: Works well - Perfect function

## 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 |
| Best Sellers Rank | #25,801 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Undersink Water Filtration Replacement Parts |
| Brand | APEC WATER |
| Brand Name | APEC WATER |
| Customer Reviews | 4.5 out of 5 stars 906 Reviews |
| Exterior Finish | Plastic |
| Included Components | ASO |
| Inlet Connection Size | 0.25 inches |
| Inlet Connection Type | Quick Connect |
| Item Dimensions | 6.1 x 3.15 x 1.81 inches |
| 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 | 1.76 ounces |
| Item dimensions L x W x H | 6.1 x 3.15 x 1.81 inches |
| Manufacturer | APEC Water Systems |
| Manufacturer Part Number | ASO |
| Material | Plastic |
| Material Type | Plastic |
| Maximum Pressure | 85 psi |
| 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 | NSF |
| UPC | 851001007402 |
| Unit Count | 1 Count |
| Valve Type | Automatic Shut Off Valve |

## Product Details

- **Brand:** APEC WATER
- **Exterior Finish:** Plastic
- **Inlet Connection Size:** 0.25 Inches
- **Inlet Connection Type:** Quick Connect
- **Item dimensions L x W x H:** 6.1 x 3.15 x 1.81 inches
- **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

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

Works as expected

### ⭐⭐⭐⭐⭐ Works well
*by S***K on August 22, 2026*

Perfect function

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

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**Shop now:** [https://www.desertcart.tw/products/31132819-apec-water-aso-auto-shut-off-valve-replacement-part-0](https://www.desertcart.tw/products/31132819-apec-water-aso-auto-shut-off-valve-replacement-part-0)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-09-08*