# Safety valve Afriso MSW 1/2" x 3/4" 6 bar model 42421

**URL:** https://aio.lv/en/product--afriso-42421--11836330
**Data updated:** 2026-03-09 14:49 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Afriso
**Manufacturer code:** 42421
**EAN:** 4016203424211
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--afriso-42421--11836330

## 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

Afriso MSW safety valve model 42421 is a mechanical pressure relief valve with connection sizes 1/2" x 3/4" and a set pressure of 6 bar. Designed to protect closed systems from overpressure, it is suitable for heating, hot water and boiler applications where controlled pressure discharge is required. Compact construction allows inline installation and reliable, repeatable operation.

## Long description

Afriso MSW 1/2" x 3/4" 6 bar model 42421 is a mechanical safety valve designed to protect closed heating and hot water systems from overpressure. The compact inline construction provides a dependable pressure relief function with a fixed set pressure of 6 bar. The valve is suitable for installation on boilers, hot water tanks and heating circuits where controlled discharge of excess pressure is required to maintain system safety and integrity.
Advantages
The valve offers precise mechanical pressure relief without electrical components, ensuring simple and reliable operation. Its compact design enables straightforward inline mounting and integration into existing pipework. Constructed for repeated actuation, the device delivers consistent opening characteristics at the specified set pressure and a stable seat resealing to minimise leakage after discharge.
Suitable for
Boiler safety protection in domestic and light commercial systems
Hot water storage tanks and cylinder protection
Central heating circuits and closed hydronic systems
Applications requiring a fixed 6 bar overpressure relief
Key specifications
Connection sizes: 1/2" x 3/4" for inline plumbing installation
Set pressure: 6 bar (fixed)
Operation: mechanical spring-loaded pressure relief
Designed for repeated actuations with consistent opening behaviour
Compact inline construction suitable for tight installation spaces
How to use
Install the safety valve in the correct orientation within the system pipework according to applicable national and local installation rules. The valve must be fitted to a suitable outlet or discharge line to safely route expelled fluid. Do not modify the set pressure; the valve is factory-set to operate at 6 bar. After installation, test the system to confirm correct operation and that discharge pipework is adequately routed and supported to prevent stress on the valve connection.
Usage recommendations
Perform regular visual inspections and periodic functional tests in line with relevant maintenance schedules and local regulations. Replace the valve if persistent leakage or failure to reseat is observed. Ensure compatible materials and pressure ratings in the rest of the system to maintain safe operation.

## FAQ

### How much does the Afriso MSW safety valve 1/2"x3/4" 6 bar 42421 cost, and is it available for purchase?

The price is 14.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 28 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 Afriso 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 Afriso 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/11836330/67235995_large.webp