# DOSPEL Non-Return Valve DN120

**URL:** https://aio.lv/en/product--dospel-007-4251--12506694
**Data updated:** 2026-06-10 09:23 (EEST)
**Category:** Ventilation Filters
**Manufacturer:** DOSPEL
**Manufacturer code:** 007-4251
**EAN:** 5901560511140
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 3.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 3.30 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dospel-007-4251--12506694

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.89 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

The DOSPEL DN120 non-return valve is a specialized ventilation component designed to prevent backflow of air in duct systems. It ensures one-way airflow, effectively blocking odors, cold air, or contaminants from entering the room when the fan is inactive. Constructed for durability and easy installation, this valve is an essential accessory for maintaining efficient ventilation performance in residential or commercial settings.

## Long description

The DOSPEL Non-Return Valve DN120 is a high-quality ventilation accessory engineered to regulate airflow within duct systems. By allowing air to move in only one direction, this component effectively prevents the backflow of air, ensuring that odors, cold drafts, and external contaminants do not enter your living or working space when the ventilation fan is turned off. Crafted from durable ABS plastic, this valve is designed for long-term reliability and seamless integration into standard ventilation setups.
Advantages
The primary benefit of this non-return valve is its ability to significantly improve the efficiency of your ventilation system by eliminating unwanted air circulation. Its robust construction from high-grade ABS plastic ensures resistance to environmental factors and mechanical wear, providing a stable solution for maintaining indoor air quality. The design is optimized for quick and straightforward installation, making it an ideal choice for both professional installers and DIY enthusiasts looking to upgrade their existing ductwork without complex modifications.
Suitable for
Residential ventilation systems in kitchens and bathrooms
Commercial office spaces requiring odor control
Preventing cold air ingress in ventilation ducts
Maintaining hygiene in shared ventilation shafts
This valve may not be suitable for high-temperature industrial exhaust systems where materials other than standard ABS plastic are required. It is also not intended for use in systems with extremely high pressure or corrosive chemical vapors that could degrade the plastic components over time.
Key specifications
Diameter: 120 mm
Material: Durable ABS plastic
Function: One-way airflow regulation
Compatibility: Standard ventilation ducts
To install the valve, insert it directly into the ventilation duct or at the connection point of the fan. Ensure the flap mechanism is oriented correctly to allow air to exit the room while blocking the return path. Once positioned, secure the unit firmly to prevent vibration or displacement during fan operation. Regular inspection is recommended to ensure the flap remains free of dust or debris that could hinder its movement.
What to consider before purchase
Verify the internal diameter of your existing ductwork matches the 120 mm specification
Ensure there is sufficient space within the duct for the flap to open fully
Check if your ventilation system requires a specific mounting orientation
For optimal performance, clean the valve flap periodically to remove accumulated dust, ensuring the mechanism continues to operate smoothly and maintains a tight seal when the fan is inactive.

## FAQ

### How much does the DOSPEL DN120 Non-Return Valve cost, and is it available for purchase?

The price is 3.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 164 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 01.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All DOSPEL products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized DOSPEL service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12506694/68848283_large.webp