# Return Valve SIMFER 125 mm — inlet/outlet check valve, Ø125

**URL:** https://aio.lv/en/product--simfer-5414425910489--11835765
**Data updated:** 2026-03-09 14:49 (EET)
**Category:** Ventilation Filters
**Manufacturer:** SIMFER
**Manufacturer code:** 5414425910489
**EAN:** 5414425910489
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 50.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 41.73 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--simfer-5414425910489--11835765

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

SIMFER return valve with a nominal diameter of 125 mm designed to prevent backflow in ventilation or duct systems. The valve serves as a check/backflow device for air or exhaust paths, fitting ducts with Ø125 connection. Suitable for use in residential and commercial ventilation, HVAC exhaust lines, and appliance air outlets where a reliable one-way flow is required.

## Long description

SIMFER return valve with a nominal diameter of 125 mm is a one-way inlet/outlet check valve designed to prevent backflow in ventilation and duct systems. The valve fits ducts with Ø125 connections and is intended for installation in air supply, exhaust lines and appliance outlets where controlled, one-directional airflow is required. Its compact design allows integration in domestic and commercial ventilation and HVAC systems to maintain proper air movement and prevent reverse air entry.
Advantages
The SIMFER Ø125 check valve provides reliable prevention of backflow with a simple mechanical flap that opens under forward airflow and closes when flow reverses. Its construction is suitable for standard circular ducts with 125 mm diameter, enabling straightforward installation and replacement. The valve requires no external power, operates silently under normal conditions and contributes to maintaining indoor air quality by preventing unwanted air ingress and odor transfer.
Suitable for
Residential ventilation ducts with Ø125 connections
Bathroom and kitchen exhaust lines
HVAC exhaust and intake sections in small commercial spaces
Appliance outlet connections where one-way airflow is required
Key specifications
Nominal diameter: 125 mm (fits Ø125 ducts)
Function: one-way check/return valve for air flows
Application: ventilation, exhaust, duct systems
Operation: passive mechanical flap; no external power required
Installation type: inline connection for circular ducts
How to use
Install the valve into a circular duct section with a 125 mm internal diameter, ensuring the flap faces the direction of intended airflow so it opens under normal operation and closes when reverse flow occurs. Secure the valve using appropriate duct connectors, clamps or sealant compatible with the duct material to prevent leaks. After installation, verify that the flap moves freely and that there are no obstructions or misalignments that could impede operation.
Usage recommendations
For reliable performance, inspect the valve periodically for dust buildup, debris or mechanical wear, and clean or replace the unit if the flap does not seal or move freely. Use in environments within typical residential and commercial ventilation temperature and humidity ranges; avoid exposure to corrosive gases or particulate loads beyond standard ventilation conditions. When integrating into HVAC systems, confirm compatibility with ductwork and airflow rates to ensure the check valve does not create excessive pressure drop.

## FAQ

### How much does the Return Valve SIMFER 125 mm cost, and is it available for purchase?

The price is 50.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 06.07.2026 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 SIMFER 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 SIMFER 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/11835765/67235512_large.webp