---
product_id: 409695865
title: "Neverest® RK Non-return Flap 100 mm Automatic Non-return Flap For Pipe Installation Pipe Connector Galvanized Steel with Sealing Rubber Aluminum Valves"
brand: "neverest"
price: "SAR 113"
currency: SAR
in_stock: true
category: "Neverest"
url: https://www.desertcart.com.sa/products/409695865-neverest-rk-non-return-flap-100-mm-automatic-non-return
store_origin: SA
region: Saudi Arabia
---

# Automatic airflow control 100mm precision fit Galvanized steel durability Neverest® RK Non-return Flap 100 mm Automatic Non-return Flap For Pipe Installation Pipe Connector Galvanized Steel with Sealing Rubber Aluminum Valves

**Brand:** neverest
**Price:** SAR 113
**Availability:** ✅ In Stock

## Summary

> 🌪️ Neverest RK: The silent gatekeeper your ventilation system deserves!

## Quick Answers

- **What is this?** Neverest® RK Non-return Flap 100 mm Automatic Non-return Flap For Pipe Installation Pipe Connector Galvanized Steel with Sealing Rubber Aluminum Valves by neverest
- **How much does it cost?** SAR 113 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/409695865-neverest-rk-non-return-flap-100-mm-automatic-non-return)

## Best For

- neverest enthusiasts

## Why This Product

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

## Key Features

- • **Smart Automatic Flap:** Opens with exhaust airflow and closes instantly to block cold drafts and backflow, optimizing ventilation efficiency.
- • **Lightweight Yet Durable:** Designed for easy installation and operation, even by small fans, making it ideal for both pros and hobbyists.
- • **Seamless 100mm Integration:** Perfectly engineered for standard pipe installations, ensuring a snug and reliable fit every time.
- • **Robust Galvanized Steel Build:** Corrosion-resistant exterior guarantees long-lasting performance in any environment.
- • **Versatile Ventilation Solution:** Compatible with air conditioners, dryers, cooker hoods, and more—your all-in-one airflow guardian.

## Overview

The Neverest® RK Non-return Flap is a 100mm galvanized steel pipe connector featuring an automatic flap with sealing rubber. It prevents backflow and cold air ingress by opening with exhaust airflow and closing immediately when airflow stops. Lightweight yet durable, it fits standard ventilation systems including air conditioners, dryers, and cooker hoods, ensuring efficient and reliable airflow control for both professionals and DIY enthusiasts.

## Description

connector,pipe connector,4 inch pipe connector,metal hose connector, connector,ducting connector hose connector,vent connector,backdraft shutter,backdraught shutter,backdraft shutter 100mm,100mm backdraft shutter, bathroom tumble chimney blocker drain draught heater inline draughts internal back water wall washing machine grill system stopper flexible hose pipe vent cover back draft shutter 100mm returns mesh dryer pipe heat recovery ventilation 4 inch ducting 4 inch extractor fan tumble dryer vent hose extractor fan bathroom air vent covers for walls chimney draught excluder insulated ducting 100mm external walls drafts soffit vents toilet covers cooker extra non return valve reducer simple seal tape hood 100mm non return valve bathroom ventilation fan inline extractor fan drain draught heater inline heat recovery ventilation system

## Features

- Neverest RK backflow flap 100 mm Automatic backflow flap For pipe installation Pipe connector Galvanized steel with sealing rubber Aluminum flap
- Perfect choice for hobby craftsmen and professionals. The lightweight flaps can also be opened by small fans.
- FUNCTION: Hose connector with backflow flap prevents the return of the exhaust air or the inflow of cold outside air. The flaps open when the fan blows the exhaust air outwards and closes automatically as soon as the airflow stops. The flaps must be aligned horizontally to close optimally.
- Versatile in all supply air and exhaust systems, such as air conditioners, dryers, cooker hood and ventilation systems.
- We are subject matter experts and there 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 | B011INHF5A |
| Best Sellers Rank | #63,754 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #193 in Registers, Grilles & Vents |
| Brand Name | neverest |
| Color | Silver |
| Connector Type | Pipe connector |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,200) |
| Exterior Finish | Galvanised steel |
| Item Dimensions | 57 x 52 x 40 centimeters |
| Item Weight | 140 Grams |
| Manufacturer | neverest |
| Manufacturer Part Number | 40545030039031 |
| Material Type | Steel, galvanized |
| Number of Pieces | 1 |
| Size | 100mm |
| Thread Size | 100 |
| Thread Type | UN |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** neverest
- **Colour:** Silver
- **Item dimensions L x W x H:** 57 x 52 x 40 centimeters
- **Material:** Steel, galvanized
- **Size:** 100mm

## Images

![Neverest® RK Non-return Flap 100 mm Automatic Non-return Flap For Pipe Installation Pipe Connector Galvanized Steel with Sealing Rubber Aluminum Valves - Image 1](https://m.media-amazon.com/images/I/61R-zDPpQKL.jpg)

## Questions & Answers

**Q: Hi, is the 5" made to go on to 5" duct**
A: I purchsaed the 4 inch for my clothes dryer exhaust vent to the outside of my house. They are true to size and a 5 inch should fit a 5 inch duct perfectly. This is an excellent addition to either a stove vent or clothes dryer vent. It prevents back draft air from entering the duct and also prevents conditioned air from escaping my house.

**Q: Hi - would it be best to put this at the end of the vent (near the outside) or on the house closest to the dryer? My vent is installed in the soffit.**
A: Always at the end of the vent where the air exhaust to the outside of your house. You want to keep cold and hot air from being forced into your house on windy days as well as insect and birds from nesting. I have one on my kitchen stove vent on the outside brick wall and on my dryer vent on the side of my house. Before i installed it my laundry room was cold all winter from wibd being forced in.

**Q: For my cooktop vent, i have a broken plastic damper i need to replace. this one is 5.5in od, what product would work for this?**
A: I,m using a reducer on the top of the vent hood over the cook top from 5 inch vent to 4 inch duct and then i am using the 4 inch pressure activated back draft your referring to on the outside wall with an ordinary clothes dryer rain shield over the opening. The dryer vent pipe cover should have a wind / rain shield incorporated in it. Most dryer vent covers have a plastic door which does not permit a positive closer in windy conditions. I also have the spring loaded damper door on my clothes dryer. These doors are great for preventing blow back into your house when either the cooktop vent or dryer are not in use.

**Q: Do u make a 7 inch inline damper?**
A: Good Morning,
the RK is available in 160mm or 200mm

## Frequently Bought Together

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*Product available on Desertcart Saudi Arabia*
*Store origin: SA*
*Last updated: 2026-07-05*