---
product_id: 270481108
title: "Longdex 1/4\" Tube 4 Way Port Auto Shut Off Valve with Push Fittings For RO Reverse Osmosis Water Filter System"
brand: "yulben"
price: "A$17"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/270481108-longdex-1-4-tube-4-way-port-auto-shut-off
store_origin: AU
region: Australia
---

# Auto Shut-Off Quick Connect 4-Way Port Longdex 1/4" Tube 4 Way Port Auto Shut Off Valve with Push Fittings For RO Reverse Osmosis Water Filter System

**Brand:** yulben
**Price:** A$17
**Availability:** ✅ In Stock

## Summary

> 💡 Elevate Your Water Game with Smart Automation!

## Quick Answers

- **What is this?** Longdex 1/4" Tube 4 Way Port Auto Shut Off Valve with Push Fittings For RO Reverse Osmosis Water Filter System by yulben
- **How much does it cost?** A$17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/270481108-longdex-1-4-tube-4-way-port-auto-shut-off)

## Best For

- yulben enthusiasts

## Why This Product

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

## Key Features

- • **Compact Design:** Space-saving dimensions of 3.77 x 2.08 x 3.26 inches.
- • **Universal Compatibility:** Designed to fit most reverse osmosis systems seamlessly.
- • **Robust Pressure Handling:** Operates efficiently under a working pressure of 0-30kg.
- • **Quick Connect Convenience:** Push fittings for easy installation and maintenance.
- • **Effortless Water Management:** Automatically shuts off at 65% tank pressure, ensuring optimal performance.

## Overview

The Longdex 1/4" Tube 4 Way Port Auto Shut Off Valve is a cutting-edge component for reverse osmosis water filter systems, featuring automatic shut-off capabilities, quick connect fittings, and a compact design that ensures compatibility and efficiency in water management.

## Description

Longdex 1/4" Tube 4 Way Port Auto Shut Off Valve with Push Fittings For RO Reverse Osmosis Water Filter System

## Features

- Automatic shut-off valve with Quick Connect Fittings for reverse osmosis systems.
- ASO Valve allows your water filter to turn off the water supply when the tank pressure reaches approximately 65% of the supply pressure.
- The connection method of the four-side valve: the raw water enters from the IN port, and the OUT port enters the RO membrane shell. The pure water outlet of the membrane shell is connected to the upper port of the IN port.
- Suitable for most reverse osmosis water systems.
- Working pressure: 0-30kg.Packing quantity: 1PC.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Plastic |
| Brand | Longdex |
| Item dimensions L x W x H | 3.77 x 2.08 x 3.26 inches |
| Inlet Connection Type | Compression |
| Number of Ports | 4 |
| Manufacturer | Longdex |
| UPC | 750225361232 |
| Part Number | TPASOVPF-1 |
| Item Weight | 2.11 ounces |
| Product Dimensions | 3.77 x 2.08 x 3.26 inches |
| Item model number | TPASOVPF-1 |
| Item Package Quantity | 1 |
| Batteries Included? | No |

## Images

![Longdex 1/4" Tube 4 Way Port Auto Shut Off Valve with Push Fittings For RO Reverse Osmosis Water Filter System - Image 1](https://m.media-amazon.com/images/I/512lX2oOrwL.jpg)

## Questions & Answers

**Q: Is this supposed to regulate the pressure going in to the membrane down to 58psi?**
A: You have to check the tank pressure after the tank is completely full and adjust the pressure to tank specifications.

**Q: Will this work on express water model ro5dx**
A: I should probably say no because I do not your brand, but I will say this, if your system has this auto shut-off then it should work as long as you install it with the tubes going to the correct ports. I would change one line at a time. Keep in mind I am assuming you know that your auto shut-off is bad.

**Q: I tried another brand of this same valve but it didnt work.   The whole system vibrated and kept running.  Will i have the same issue with this one?**
A: If you have it installed properly. It should work fine. I've had no problems with the  one I purchased and installed.

**Q: Does anyone know if this would work to automatically fill a coffee maker's water resistor? Float valves out there are simply too large to function.**
A: You may find a way to incorporate this device into your need, but my guess would be that it would take more effort than it’s worth. This is a specific device for use in RO water systems to control flow based on pressure differences between circuits. Sounds like you still need to find some type of miniature float valve assembly.

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-17*