---
product_id: 592960438
title: "RKKI Check Valve 100 mm Non-Return Valve for Sheet Metal and Aluminium Tubes Flex/Automatic Close/Plastic"
brand: "calimaero"
price: "€ 0.33"
currency: EUR
in_stock: false
reviews_count: 6
url: https://www.desertcart.es/products/592960438-rkki-check-valve-100-mm-non-return-valve-for-sheet
store_origin: ES
region: Spain
---

# 230V electric fan compatible Smooth-running flaps for effortless airflow 100 mm blade length for precise fit RKKI Check Valve 100 mm Non-Return Valve for Sheet Metal and Aluminium Tubes Flex/Automatic Close/Plastic

**Brand:** calimaero
**Price:** € 0.33
**Availability:** ❌ Out of Stock

## Summary

> 🛠️ Upgrade your airflow game with the RKKI Check Valve — breathe smarter, live better!

## Quick Answers

- **What is this?** RKKI Check Valve 100 mm Non-Return Valve for Sheet Metal and Aluminium Tubes Flex/Automatic Close/Plastic by calimaero
- **How much does it cost?** € 0.33 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/592960438-rkki-check-valve-100-mm-non-return-valve-for-sheet)

## Best For

- calimaero enthusiasts

## Why This Product

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

## Key Features

- • **Trusted Expertise:** Backed by 40+ years of ventilation innovation and dedicated customer support
- • **Effortless Installation:** Push-fit inline design perfect for retrofitting existing ventilation systems
- • **Seamless Airflow Control:** Automatic flap operation ensures no backdraft or cold air intrusion
- • **Durable Weatherproof Build:** UV-resistant plastic guarantees long-lasting performance indoors
- • **Universal HVAC Compatibility:** Works flawlessly with exhaust fans, AC, tumble dryers, and cooker hoods

## Overview

The RKKI Check Valve is a 100 mm inline non-return valve designed for sheet metal and aluminum tubes, featuring smooth-running plastic flaps that automatically open and close to prevent backdrafts. Compatible with 230V exhaust fans and various HVAC systems, it offers easy push-fit installation, weatherproof durability, and is backed by over 40 years of ventilation expertise.

## Description

Full description not available

## Features

- PRODUCT FEATURES This calimaero inline vent draft blocker works well in square meter 95mm. Use sealing tape or sealing band for tight fit into hoses and vents. The 4 inch backdraft damper prevents the exhaust air from flowing back and cold air from flowing in. The flaps automatically open when the fan blows the exhaust air and close when the air flow stops.
- INSTALLATION The 4 inch HVAC damper is pushed completely into the exhaust pipe. Easy to install and perfect for retrofitting bathroom fans and ventilation systems without a backdraft damper 4 inch The flaps must be aligned horizontally in order to close optimally.
- VERSATILE USE This 4 inch damper duct is applicable in all supply and exhaust air systems, such as air conditioning systems, tumble dryers, extractor fan, cooker hood and other HVAC applications. Our well-made 4 backdraft damper's plastic is weatherproof and UV resistant.
- PERFORMANCE Ideal choice for improving any ducting system without a backdraft duct damper. The smooth-running flaps can also be opened by small fans great for your home improvement.
- CUSTOMER SERVICE We are experts in ventilation for more than 40 years. If you have any questions, please contact us directly and we'll promptly assist you.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | calimaero |
| Color | White |
| Electric fan design | Exhaust Fan |
| Power Source | Electric |
| Style | Industrial |
| Product Dimensions | 3.74"D x 3.74"W x 0.28"H |
| Room Type | Bathroom |
| Special Feature | Smooth-Running Flaps for Small Fan Opening |
| Recommended Uses For Product | Applicable in all supply and exhaust air systems |
| Finish Type | Painted |
| Blade Length | 100 Millimeters |
| Theme | Modern |
| Speed | 1 RPM |
| Voltage | 230 Volts |
| Switch Type | On/Off |
| Item Weight | 0.02 Kilograms |
| Indoor/Outdoor Usage | Indoor |
| Model Name | Backdraft Shutter Inline RKKI 4 Inch |
| Control Method | Touch |
| Blade Material | Plastic |
| Is Cordless? | Yes |
| Number of Power Levels | 1 |
| Main Power Connector Type | Standard Household Plug (e.g., Type A, Type B) |
| Manufacturer | calimaero |
| Size | 100 mm |
| Form Factor | Inline |
| Part Number | RKKI-4 |
| Item Weight | 0.704 ounces |
| Item model number | RKKI 100 |
| Is Discontinued By Manufacturer | No |
| Finish | Painted |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Special Features | Smooth-Running Flaps for Small Fan Opening |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** calimaero
- **Color:** White
- **Electric fan design:** Exhaust Fan
- **Power Source:** Electric
- **Style:** Industrial
- **Product Dimensions:** 3.74"D x 3.74"W x 0.28"H
- **Room Type:** Bathroom
- **Special Feature:** Smooth-Running Flaps for Small Fan Opening
- **Recommended Uses For Product:** Applicable in all supply and exhaust air systems
- **Finish Type:** Painted

## Images

![RKKI Check Valve 100 mm Non-Return Valve for Sheet Metal and Aluminium Tubes Flex/Automatic Close/Plastic - Image 1](https://m.media-amazon.com/images/I/41-Tj7z7FcL.jpg)
![RKKI Check Valve 100 mm Non-Return Valve for Sheet Metal and Aluminium Tubes Flex/Automatic Close/Plastic - Image 2](https://m.media-amazon.com/images/I/51v4YxSzN+L.jpg)
![RKKI Check Valve 100 mm Non-Return Valve for Sheet Metal and Aluminium Tubes Flex/Automatic Close/Plastic - Image 3](https://m.media-amazon.com/images/I/710PUBHoSAL.jpg)
![RKKI Check Valve 100 mm Non-Return Valve for Sheet Metal and Aluminium Tubes Flex/Automatic Close/Plastic - Image 4](https://m.media-amazon.com/images/I/61-3yU31EoL.jpg)
![RKKI Check Valve 100 mm Non-Return Valve for Sheet Metal and Aluminium Tubes Flex/Automatic Close/Plastic - Image 5](https://m.media-amazon.com/images/I/61v1M-1nWkL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice ítem
*by F***. on February 4, 2025*

Work great on my project

### ⭐⭐⭐⭐ Small and efficient
*by C***S on October 8, 2024*

The diameter was slightly smaller than the bathroom extractor (both 100mm), so I adjusted it with many turns of sealing duct tape and it worked fine

### ⭐⭐⭐ Just ok
*by D***E on January 25, 2025*

Served its purpose however has to be installed horizontally or springs will not keep damper doors closed

## Frequently Bought Together

- calimaero® RKKI Backdraft damper 4 Dryer Vent Backflow Preventer for HVAC Automatic Vent Damper 4 inch duct damper DIN EN 1506 Dryer Vent Damper UV Resistant Plastic
- ZHUOMINGJIA 3 Way Y Shape Duct Connector, ABS Duct Splitter for Exhaust Fan Dryer Vent Hose,4 Inch Dia with 3 PCS Hose Clamps (ABS,4 inches)
- VIVOSUN D4 4 Inch 195 CFM Inline Duct Ventilation Fan HVAC Vent Blower for Hydroponics Grow Tent

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-01-29*