---
product_id: 31132819
title: "APEC Water Systems Auto Shut Off Valve Replacement Part (ASO)"
price: "₩33357"
currency: KRW
in_stock: true
reviews_count: 8
url: https://www.desertcart.kr/products/31132819-apec-water-systems-auto-shut-off-valve-replacement-part-aso
store_origin: KR
region: South Korea
---

# Max pressure 85 PSI 0.25 inch Quick Connect ports Lightweight & easy install APEC Water Systems Auto Shut Off Valve Replacement Part (ASO)

**Price:** ₩33357
**Availability:** ✅ In Stock

## Summary

> 💧 Upgrade your RO system with effortless precision!

## Quick Answers

- **What is this?** APEC Water Systems Auto Shut Off Valve Replacement Part (ASO)
- **How much does it cost?** ₩33357 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/31132819-apec-water-systems-auto-shut-off-valve-replacement-part-aso)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Certified Quality:** NSF-approved for trusted water safety and performance
- • **Quick Connect Design:** Snap-in installation saves time and effort
- • **Durable & Lightweight:** Robust plastic build at just 1.76 oz for easy handling
- • **Seamless Compatibility:** Fits top APEC RO models for hassle-free upgrades
- • **Reliable Pressure Handling:** Operates safely up to 85 PSI for consistent water flow

## Overview

The APEC Auto Shut Off Valve Replacement Part (ASO) is a lightweight, easy-to-install component designed for multiple APEC Reverse Osmosis systems. Featuring 0.25 inch quick connect ports and NSF certification, it ensures reliable shutoff performance under pressures up to 85 PSI, making it an essential upgrade for maintaining optimal water filtration efficiency.

## Description

desertcart.com: APEC Water Systems Auto Shut Off Valve Replacement Part (ASO) : Tools & Home Improvement

Review: Easy repair of RO system - Fixed my RO system. Easy repair if you always water running this may be your issue.
Review: WILL WORK IN WATTS PREMIER SYSTEMS, NOT JUST APEC - I used this to replace the ASO on our Watts Ro-pure system. It works as a direct replacement. I do notice that the system pressure is better now and the endless wastewater drainage has stopped. Hooray.

## 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 |
|---------------|-------|
| Material | Plastic |
| Brand | APEC WATER |
| Item dimensions L x W x H | 6.1 x 3.15 x 1.81 inches |
| Inlet Connection Size | 0.25 Inches |
| Outlet Connection Type | Quick Connect |
| Maximum Operating Pressure | 85 Pound per Square Inch |
| Number of Ports | 2 |
| Outlet Connection Size | 0.25 Inches |
| Specification Met | NSF |
| Manufacturer | APEC Water Systems |
| UPC | 851001007402 |
| Part Number | ASO |
| Item Weight | 1.76 ounces |
| Product Dimensions | 6.1 x 3.15 x 1.81 inches |
| Item model number | ASO |
| Is Discontinued By Manufacturer | No |
| Size | 0.25 Inch |
| Color | White |
| Style | RO Shutoff Valve |
| Item Package Quantity | 1 |
| Included Components | ASO |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Plastic
- **Brand:** APEC WATER
- **Item dimensions L x W x H:** 6.1 x 3.15 x 1.81 inches
- **Inlet Connection Size:** 0.25 Inches
- **Outlet Connection Type:** Quick Connect
- **Maximum Operating Pressure:** 85 Pound per Square Inch
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.25 Inches
- **Specification Met:** NSF
- **Manufacturer:** APEC Water Systems

## Images

![APEC Water Systems Auto Shut Off Valve Replacement Part (ASO) - Image 1](https://m.media-amazon.com/images/I/71k8DSC3sQL.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

### ⭐⭐⭐⭐⭐ Easy repair of RO system
*by D***L on September 26, 2025*

Fixed my RO system. Easy repair if you always water running this may be your issue.

### ⭐⭐⭐⭐⭐ WILL WORK IN WATTS PREMIER SYSTEMS, NOT JUST APEC
*by R***R on October 8, 2025*

I used this to replace the ASO on our Watts Ro-pure system. It works as a direct replacement. I do notice that the system pressure is better now and the endless wastewater drainage has stopped. Hooray.

### ⭐⭐⭐⭐⭐ Perfect replacement
*by T***D on October 2, 2025*

Exactly what I needed, works good.

## 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.kr/products/31132819-apec-water-systems-auto-shut-off-valve-replacement-part-aso](https://www.desertcart.kr/products/31132819-apec-water-systems-auto-shut-off-valve-replacement-part-aso)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-25*