---
product_id: 441807347
title: "APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch"
brand: "apec water"
price: "€ 39.40"
currency: EUR
in_stock: true
category: "Apec Water"
url: https://www.desertcart.pt/products/441807347-apec-water-aso-auto-shut-off-valve-replacement-part-0
store_origin: PT
region: Portugal
---

# 1/4 inch Quick Connect Auto shut-off at 65% tank pressure Lightweight & easy install APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch

**Brand:** apec water
**Price:** € 39.40
**Availability:** ✅ In 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?** € 39.40 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/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

- • **Quick Connect Design:** Effortless installation with 1/4 inch compression fittings
- • **Certified Reliability:** NSF certified for trusted water safety and performance
- • **Durable & Lightweight:** High-quality plastic build ensures longevity without bulk
- • **Precision Water Control:** Automatically stops water flow to prevent waste and wear
- • **Universal Compatibility:** Fits multiple APEC RO models for seamless integration

## Overview

The APEC Auto Shut Off Valve Replacement Part (ASO) is a lightweight, easy-to-install 1/4 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. Compatible with multiple APEC RO models and NSF certified, it ensures efficient, reliable water filtration performance.

## 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.

## 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 Name | APEC WATER |
| Connector Type | Compression |
| Country of Publication | USA |
| Customer Reviews | 4.5 4.5 out of 5 stars (884) |
| 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 | 0.11 Pounds |
| Manufacturer | APEC Water Systems |
| Manufacturer Part Number | ASO |
| 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/315CILiX0iL.jpg)
![APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch - Image 3](https://m.media-amazon.com/images/I/41JGI127b0L.jpg)
![APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch - Image 4](https://m.media-amazon.com/images/I/419Y7i4TlgL.jpg)
![APEC Water ASO Auto Shut Off Valve Replacement Part, 0.25 Inch - Image 5](https://m.media-amazon.com/images/I/41eZ+R9uUtL.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

## 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.pt/products/441807347-apec-water-aso-auto-shut-off-valve-replacement-part-0](https://www.desertcart.pt/products/441807347-apec-water-aso-auto-shut-off-valve-replacement-part-0)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-09-23*