---
product_id: 384233436
title: "Seal 100 mm Non-Return Valve for Ventilation Modernization without Return Valve/Silent, Recycled Plastic/Can Be Used Aluminium Flex, PVC, Sheet Metal, KG, HG"
brand: "calimaero"
price: "€ 55.05"
currency: EUR
in_stock: true
reviews_count: 5
category: "Calimaero"
url: https://www.desertcart.hr/products/384233436-seal-100-mm-non-return-valve-for-ventilation-modernization-without
store_origin: HR
region: Croatia
---

# Silent rubber flap operation 100mm recycled plastic build Universal fit with rubber sealing ring Seal 100 mm Non-Return Valve for Ventilation Modernization without Return Valve/Silent, Recycled Plastic/Can Be Used Aluminium Flex, PVC, Sheet Metal, KG, HG

**Brand:** calimaero
**Price:** € 55.05
**Availability:** ✅ In Stock

## Summary

> ♻️🔇 Upgrade your airflow game—quiet, clean, and universally sealed!

## Quick Answers

- **What is this?** Seal 100 mm Non-Return Valve for Ventilation Modernization without Return Valve/Silent, Recycled Plastic/Can Be Used Aluminium Flex, PVC, Sheet Metal, KG, HG by calimaero
- **How much does it cost?** € 55.05 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/384233436-seal-100-mm-non-return-valve-for-ventilation-modernization-without)

## 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

- • **Eco-Friendly Efficiency:** Crafted from durable recycled plastic for a sustainable ventilation upgrade.
- • **Universal Compatibility:** Seamlessly fits all exhaust pipes—PVC, aluminum flex, sheet metal—thanks to its flexible rubber outer ring.
- • **Easy Installation Upgrade:** Perfect for modernizing ventilation systems or bathroom extractors lacking a check valve, with a secure push-in design.
- • **Trusted Quality & Support:** CE and RoHS certified with expert customer service ready to assist your professional or DIY project.
- • **Whisper-Quiet Performance:** Rubber flaps open and close silently—no more annoying rattles disrupting your space.

## Overview

The Seal 100 mm Non-Return Valve is a silent, eco-conscious ventilation solution made from recycled plastic with a rubber sealing ring. Designed for universal compatibility across various exhaust pipe materials, it prevents backflow and cold air intrusion while eliminating flap noise. Ideal for professionals and DIYers upgrading ventilation systems without existing check valves, it combines certified quality with hassle-free installation.

## Description

The 100 mm diameter check valve is the perfect solution if your ventilation system or bathroom extractor has been installed without a check valve. The non-return valve hood is environmentally friendly thanks to the use of recycled plastic. The outer rubber ring of the suction valve makes it universal and the rubber valves prevent annoying flap noise.

Review: Works! Fixed a cold draft in my bathroom exhaust vent- easy install inside the pvc pipe with no tools
Review: We have a half bath in our house(built 2017) that was always cold. I've checked the insulation, wi dows seals, and even upgraded the heat run fron a 4" to a 5". Nothing seamed to improve the temperature in the room. I i stalled this damper i. The ventilation fan and within minutes the room was as warm as the rest of the house. Its currently -30°c here and the room is warm. 10/10 will install in every bathroom from now on.

## Features

- calimaero SEAL The 100 diameter non-return valve for the hood outlet is made of recycled plastic and, thanks to a rubber outer ring, can be used in all air exhaust pipes, regardless of the material. It prevents the return of exhaust air or the entry of cold outside air. The rubber flaps open and close silently.
- OPERATING The non-return hood valve is completely pushed into the exhaust pipe. Ideal for upgrading bathroom extractors and ventilation systems without a check valve. Rubber flaps must be aligned so that they open with the exhaust air flow. The outer rubber ring ensures a perfect seal and a secure hold.
- VERSATILE APPLICABLE The cooker hood check valve integrates into all supply and exhaust air systems such as air conditioning systems, dryers, extractor hoods and ventilation systems.
- PERFECT CHOICE for amateurs and professionals. Rubber valves are extremely quiet, unlike all metal or plastic check valves. No disturbance due to annoying rattling when opening and closing.
- We are technical experts and here for you. If you have any questions or complaints, please contact our customer service directly. Your request will be processed immediately.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08W4DM7Y5 |
| ASIN  | B08W4DM7Y5 |
| Brand Name | calimaero |
| Connector Type | Flanged |
| Customer Reviews | 3.6 3.6 out of 5 stars (658) |
| Customer reviews | 3.6 3.6 out of 5 stars (658) |
| Date First Available  | 3 September 2021 |
| Exterior Finish | Plastic |
| Inlet Connection Size | 4 Inches |
| Inlet Connection Type | Flange |
| Is Discontinued By Manufacturer  | Yes |
| Item Dimensions | 11.2 x 2.5 x 12 centimeters |
| Item Weight | 1.06 Ounces |
| Item model number  | Backdraft Exhaust Damper Seal 100 |
| Manufacturer | calimaero |
| Manufacturer  | calimaero |
| Material Type | Rubber |
| Model Number | Backdraft Exhaust Damper Seal 100 |
| Number of Pieces | 1 |
| Number of Ports | 2 |
| Outlet Connection Size | 4 Inches |
| Outlet Connection Type | Flange |
| Product Dimensions  | 11.2 x 2.5 x 12 cm; 30.05 g |
| Specification Met | CE, RoHS |
| Thread Size | 100 mm |
| Thread Type | Metric |
| Unit Count | 1 Count |
| Valve Type | Swing Check Valve |

## Product Details

- **Brand:** calimaero
- **Exterior finish:** Plastic
- **Inlet connection size:** 4 Inches
- **Item dimensions L x W x H:** 11.2 x 2.5 x 12 centimeters
- **Material:** Rubber

## Images

![Seal 100 mm Non-Return Valve for Ventilation Modernization without Return Valve/Silent, Recycled Plastic/Can Be Used Aluminium Flex, PVC, Sheet Metal, KG, HG - Image 1](https://m.media-amazon.com/images/I/61E6gaV5tvL.jpg)
![Seal 100 mm Non-Return Valve for Ventilation Modernization without Return Valve/Silent, Recycled Plastic/Can Be Used Aluminium Flex, PVC, Sheet Metal, KG, HG - Image 2](https://m.media-amazon.com/images/I/81l1PIK2hJL.jpg)
![Seal 100 mm Non-Return Valve for Ventilation Modernization without Return Valve/Silent, Recycled Plastic/Can Be Used Aluminium Flex, PVC, Sheet Metal, KG, HG - Image 3](https://m.media-amazon.com/images/I/71fSPR1W0PL.jpg)
![Seal 100 mm Non-Return Valve for Ventilation Modernization without Return Valve/Silent, Recycled Plastic/Can Be Used Aluminium Flex, PVC, Sheet Metal, KG, HG - Image 4](https://m.media-amazon.com/images/I/713IN+Sx0HL.jpg)
![Seal 100 mm Non-Return Valve for Ventilation Modernization without Return Valve/Silent, Recycled Plastic/Can Be Used Aluminium Flex, PVC, Sheet Metal, KG, HG - Image 5](https://m.media-amazon.com/images/I/81ErNMNy4aL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***N on 13 February 2026*

Works! Fixed a cold draft in my bathroom exhaust vent- easy install inside the pvc pipe with no tools

### ⭐⭐⭐⭐⭐ Review
*by D***K on 19 January 2022*

We have a half bath in our house(built 2017) that was always cold. I've checked the insulation, wi dows seals, and even upgraded the heat run fron a 4" to a 5". Nothing seamed to improve the temperature in the room. I i stalled this damper i. The ventilation fan and within minutes the room was as warm as the rest of the house. Its currently -30°c here and the room is warm. 10/10 will install in every bathroom from now on.

### ⭐⭐⭐⭐⭐ Review
*by I***A on 24 March 2026*

Polecam! Działa jak należy. Dobrze blokuje zapachy. Polecam!

## Frequently Bought Together

- calimaero® Seal Backdraft Shutter 4 Inch Inline Extractor Fan Backdraft Shutter Quiet Rubber Flaps, Fits All DN 100mm Ducting/Made from Recycled Plastic in DE
- 4 inch Dia Noise Insulation External Wall Wind Sound Baffle Vent Cover Draft Excluding Air Ventilation for Extractor Fans Heat Recovery Cottage Hotel Café
- Kair Connector with Backdraught Shutter 100mm - 4 inch Non-Return Damper Flap to Connect Duct Pipe or Flexible Ducting Hose

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-14*