# Safety Relief Valve Afriso MSW for Domestic Hot Water Tanks 8 bar Rp3/4" x Rp1" (model 42426)

**URL:** https://aio.lv/en/product--afriso-42426--11836004
**Data updated:** 2026-03-09 14:49 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Afriso
**Manufacturer code:** 42426
**EAN:** 2000000010335
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.49 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 14.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--afriso-42426--11836004

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

Safety relief valve Afriso MSW (model 42426) designed for domestic hot water storage tanks. Set to 8 bar, with Rp3/4" inlet and Rp1" outlet connection sizes. Provides overpressure protection to prevent tank and system damage by releasing excess pressure. Suitable for potable hot water systems in residential and light‑commercial installations where reliable pressure relief is required.

## Long description

The Afriso MSW safety relief valve (model 42426) is designed for domestic hot water storage tanks and potable hot water systems. Factory set to relieve at 8 bar, it connects to tanks and piping with an Rp3/4" inlet and an Rp1" outlet. The valve opens automatically when system pressure exceeds the set threshold to discharge excess pressure and protect tanks, fittings and pipelines from overpressure-related damage.
Advantages
The valve provides reliable overpressure protection with a defined 8 bar setpoint suitable for many residential and light-commercial hot water installations. Its threaded Rp3/4" inlet and Rp1" outlet ensure compatibility with common plumbing connections used on domestic storage tanks. The device is compact, mechanically simple and intended for use with potable water, reducing the risk of system failure due to excess pressure while minimizing maintenance needs when installed correctly.
Suitable for
 Domestic hot water storage tanks in single-family homes
 Small multi-family or light-commercial potable hot water systems
 Replacement of existing safety relief valves on hot water cylinders
 Systems requiring a fixed 8 bar pressure relief setting
Key specifications
 Set pressure: 8 bar relief point
 Inlet connection size: Rp 3/4" (female thread)
 Outlet connection size: Rp 1" (female thread)
 Application medium: potable hot water
 Function: automatic pressure relief to prevent overpressure
 Typical installation location: on domestic hot water storage tank or connecting pipework
How to use
Install the safety relief valve on the designated pressure tapping of the hot water tank or on the appropriate section of pipework, observing the specified inlet and outlet thread directions and ensuring proper sealing with suitable plumbing sealant or tape. The valve operates automatically; no manual adjustment is required for the factory-set 8 bar relief. Route the outlet discharge pipe to a safe discharge point or drainage location according to local regulations, ensuring it slopes and is supported to prevent backpressure. Periodically inspect the valve and discharge path for corrosion, blockages or leakage and service according to local standards and manufacturer guidance.
Usage recommendations
Verify system maximum operating pressure and thermal expansion characteristics before selecting this 8 bar valve. Where thermal expansion or closed-system conditions are present, fit an appropriate expansion vessel or expansion control device to limit the frequency of relief discharges. Ensure installation and maintenance are carried out by a qualified installer and that discharge termination complies with applicable codes and safety requirements.

## FAQ

### How much does the Afriso MSW Safety Valve 8 bar Rp3/4" x Rp1" 42426 cost, and is it available for purchase?

The price is 17.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 27 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 16.07.2026 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/11836004/67235714_large.webp