---
product_id: 37842833
title: "Pawfly Aquarium Check Valves Plastic One Way Non-Return Check Valve for Fish Tank"
brand: "pawfly"
price: "NT$373"
currency: TWD
in_stock: true
reviews_count: 13
category: "Pawfly"
url: https://www.desertcart.tw/products/37842833-pawfly-aquarium-check-valves-plastic-one-way-non-return-check
store_origin: TW
region: Taiwan
---

# 0.12" air hole diameter for smooth airflow One-way valve prevents backflow during outages Lightweight at 0.1 oz adds minimal hose weight Pawfly Aquarium Check Valves Plastic One Way Non-Return Check Valve for Fish Tank

**Brand:** pawfly
**Price:** NT$373
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your tank breathing easy with the CV6R — the silent guardian of your aquatic world!

## Quick Answers

- **What is this?** Pawfly Aquarium Check Valves Plastic One Way Non-Return Check Valve for Fish Tank by pawfly
- **How much does it cost?** NT$373 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/37842833-pawfly-aquarium-check-valves-plastic-one-way-non-return-check)

## Best For

- pawfly enthusiasts

## Why This Product

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

## Key Features

- • **Backflow Blocker:** Protects your pump by preventing water from reversing during power interruptions—no more unexpected damage.
- • **Featherlight Design:** At just 0.1 oz, it keeps your tubing agile without weighing down your setup.
- • **Effortless Maintenance:** Simple cleaning with a slim stick keeps your valve clog-free and performing at peak efficiency.
- • **Whisper-Quiet Durability:** Crafted from sturdy plastic for long-lasting, silent operation that won’t disturb your zen space.
- • **Seamless Airflow Assurance:** Precision 0.12" air holes ensure uninterrupted oxygen delivery for your aquatic ecosystem.

## Overview

The CV6R is a compact, lightweight one-way check valve designed specifically for aquarium oxygen pumps. Featuring a 0.12" air hole diameter and durable plastic construction, it prevents water backflow during power outages, ensuring pump longevity and consistent aeration. Easy to maintain and whisper-quiet, it’s an essential upgrade for any professional-grade fish tank setup.

## Description

Aquarium Air Pump Check Valves Red/Clear Clear Plastic One Way Non-Return Check Valve for Fish Tank

Review: Great quality check valves - Great quality check valves for a really reasonable price. Not much to these. Worked great for fixing my Keurig 2.0 K200 coffee maker which had a damaged air pump (very common problem I learned). Replaced the air pump and tested operation. Worked great but noticed water was being pushed into it, which is what caused it to fail the first time. Added one of these check valves in line and life is great now. Shame on Keurig for planned obsolescence.
Review: Just like describe - They work just fine

## Features

- For Oxygen Pumps Only: Great 1-way check valve for most common aquarium air pumps. NOT suitable for CO2 or other high-pressure systems to avoid crack and leak.
- Small & Light: Size: 2.1" L x 0.55" W; Diameter of air holes: 0.12"; Weight: 0.1 oz. Standard ID airline tubing: 3/16". Add little weight to your hose for smooth airflow.
- Ideal Pump Protectors: Prevent backflow of water through the tubing during a power outage or pump pause. Essential accessories for basic aeration setup in your fish tanks.
- Sturdy & Quiet: Made of reliable plastic which can be tightly connected to the hose without air leak. The check valve can endure long-time use without making noise.
- Easy Maintenance: Clean the valve regularly. Please poke it with a slim stick from the inlet side to push it open when it gets clogged inside and restricts air flow.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01N92AXHF |
| Best Sellers Rank | #7,490 in Pet Supplies ( See Top 100 in Pet Supplies ) #4 in Aquarium Air Pump Accessories |
| Brand | Pawfly |
| Brand Name | Pawfly |
| Color | Red |
| Customer Reviews | 4.5 4.5 out of 5 stars (5,442) |
| Date First Available | November 14, 2016 |
| Exterior Finish | Plastic |
| Inlet Connection Type | Compression |
| Item Dimensions LxWxH | 2.13 x 0.83 x 0.83 inches |
| Item Package Dimensions L x W x H | 3.62 x 2.95 x 0.08 inches |
| Item Weight | 10 Grams |
| Item dimensions L x W x H | 2.13 x 0.83 x 0.83 inches |
| Manufacturer | Pawfly |
| Material | Plastic |
| Number of Ports | 2 |
| Outlet Connection Type | Compression |
| Package Weight | 0.02 Kilograms |
| Part Number | PF-Ap |
| Size | 6 Pack |
| UPC | 712383629098 712383629555 |

## Product Details

- **Brand:** Pawfly
- **Exterior Finish:** Plastic
- **Inlet Connection Type:** Compression
- **Item dimensions L x W x H:** 2.13 x 0.83 x 0.83 inches
- **Manufacturer:** Pawfly
- **Material:** Plastic
- **Number of Ports:** 2
- **Outlet Connection Type:** Compression
- **UPC:** 712383629098 712383629555

## Images

![Pawfly Aquarium Check Valves Plastic One Way Non-Return Check Valve for Fish Tank - Image 1](https://m.media-amazon.com/images/I/6129zPI7nfL.jpg)

## Available Options

This product comes in different **Pattern, Color** options.

## Questions & Answers

**Q: Are these ball and spring?**
A: That is not part of the description and no such assembly is visible. You would have to ask Pawfly.

**Q: does anyone know the maximum flow rate on these check valves?**
A: NO ! But they work Great

**Q: What size hose are these made for?**
A: Standard aquarium hose 3/16" ID hose will fit. Used it with  PENN PLAX Standard Airline Tubing without any problems

**Q: What type of plastic is it made of**
A: It's a hard clear good quality plastic. Successful at backflow prevention

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great quality check valves
*by B***V on January 2, 2026*

Great quality check valves for a really reasonable price. Not much to these. Worked great for fixing my Keurig 2.0 K200 coffee maker which had a damaged air pump (very common problem I learned). Replaced the air pump and tested operation. Worked great but noticed water was being pushed into it, which is what caused it to fail the first time. Added one of these check valves in line and life is great now. Shame on Keurig for planned obsolescence.

### ⭐⭐⭐⭐⭐ Just like describe
*by A***R on March 1, 2026*

They work just fine

### ⭐⭐⭐⭐ Works effectively but the hoses slip off over time.
*by B***H on July 13, 2025*

The airflow control works just fine but due to the smooth tapered connectors, the hoses constantly slide off. I had to superglue the hose onto it

## Frequently Bought Together

- Pawfly Aquarium Check Valves Plastic One Way Non-Return Check Valve for Fish Tank
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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-23*