---
product_id: 152832628
title: "Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White"
brand: "mkk"
price: "€ 24.15"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.fi/products/152832628-connector-with-backflow-flap-check-valve-connector-ventilation-pipe-round
store_origin: FI
region: Finland
---

# 100mm diameter seamless fit Durable PVC plastic build Backflow flap prevents air return Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White

**Brand:** mkk
**Price:** € 24.15
**Availability:** ✅ In Stock

## Summary

> 🌀 Keep your air fresh and your space flawless with the ultimate ventilation connector!

## Quick Answers

- **What is this?** Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White by mkk
- **How much does it cost?** € 24.15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/152832628-connector-with-backflow-flap-check-valve-connector-ventilation-pipe-round)

## Best For

- mkk enthusiasts

## Why This Product

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

## Key Features

- • **Universal Compatibility:** Fits both indoor and outdoor ventilation systems with ease.
- • **Backflow Flap Technology:** Keeps your airflow fresh by preventing unwanted air return—no more stale air.
- • **Durable PVC Construction:** Robust, lightweight, and corrosion-resistant for long-lasting performance.
- • **Seamless 100mm Connection:** Perfectly sized for standard ventilation pipes ensuring airtight integration.
- • **2-Year Manufacturer Guarantee:** Confidence backed by a solid warranty for peace of mind.

## Overview

This 100mm diameter PVC connector with an integrated backflow flap is designed for efficient air distribution in residential and commercial ventilation systems. Its durable construction prevents air from flowing backward, ensuring fresh air circulation. Compatible with standard round ducts, it comes with a 2-year manufacturer warranty for reliable, long-term use.

## Description

Ventilation systems are intended for air distribution in ventilation systems of apartments, houses and commercial buildings. Perfect for places where the air should not return and only fresh air should remain. Connection from pipe to pipe. Specifications: Material: PVC plastic; Colour: white; Diameter: 100 mm. Note: The backflow flap may be red, blue or green in contrast to the product image. The connector itself is white

## Features

- Material: PVC plastic
- Colour: white
- Diameter: 100 mm
- Kitchen
- Volume: 0.001 m3

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Size | Klein |
| Material | Polyvinyl Chloride |
| Brand | MKK |
| Color | White |
| Connector Type | Plug |
| Thread Size | 4 inch |
| Thread Type | UN |
| Number of Pieces | 1 |
| Manufacturer | MKK |
| Part Number | A289a_SML |
| Item Weight | 1.76 ounces |
| Item model number | KO100-22 |
| Is Discontinued By Manufacturer | No |
| Shape | round |
| Item Package Quantity | 1 |
| Cutting Diameter | 1 Centimeters |
| Usage | Inside, Outside |
| Included Components | No |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | 2 Year Manufacturer Guarantee. |
| Assembled Diameter | 1 Centimeters |

## Product Details

- **Size:** Klein
- **Material:** Polyvinyl Chloride
- **Brand:** MKK
- **Color:** White
- **Item dimensions L x W x H:** 3.94 x 3.94 x 2.36 inches
- **Connector Type:** Plug
- **Thread Size:** 4 inch
- **Thread Type:** UN
- **Number of Pieces:** 1
- **Manufacturer:** MKK

## Images

![Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White - Image 1](https://m.media-amazon.com/images/I/410JRbLJ-6L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by U***R on January 30, 2025*

works great

### ⭐⭐⭐⭐ Good.
*by G***W on August 7, 2024*

The media could not be loaded. No gaskets or o-rings to help seal, but should stop most back draft. Here is a much better one: AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans https://a.co/d/hodpLQlI used this one in a corner just above the room and the better one at the outside wall. Fits nicely into a 4" 90.

### ⭐⭐⭐⭐⭐ Works as Expected
*by C***P on December 7, 2020*

Nice damper for 4 inch metal ducting, used it to isolate the existing dryer exhaust duct, from an ad hoc fan driven exhaust to vent my cat’s sealed litter box cabinet. Must install vertically. The existing dryer flow creates outward suction which seals the damper so there is no backdraft towards the newly installed fan exhaust ( very necessary to minimize lint to build up). When the fan is in operation ( with or without the counter dryer suction) the damper opens up and allows the stink to vacate my basement.. just what I needed...( the damper is installed between the t-shaped duct and the flexible piping in the picture)

## Frequently Bought Together

- Connector with Backflow Flap, Check Valve, Connector, Ventilation Pipe, Round Duct, Ventilation System, Pipe Connector, Diameter 100 mm, White
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**Shop now:** [https://www.desertcart.fi/products/152832628-connector-with-backflow-flap-check-valve-connector-ventilation-pipe-round](https://www.desertcart.fi/products/152832628-connector-with-backflow-flap-check-valve-connector-ventilation-pipe-round)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-04*