# Safety relief valve CALEFFI 1/2" 2.5 bar (model 311425)

**URL:** https://aio.lv/en/product--caleffi-311425--11836161
**Data updated:** 2026-03-09 14:49 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** CALEFFI
**Manufacturer code:** 311425
**EAN:** 8016615003512
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 13.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--caleffi-311425--11836161

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.99 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

CALEFFI safety relief valve model 311425 is a 1/2" (female) pressure safety valve set to 2.5 bar. Designed to protect heating and hot-water systems from overpressure, it releases excess pressure automatically to maintain system safety. Typical use includes domestic boilers, hot-water cylinders and small hydronic circuits requiring reliable overpressure protection.

## Long description

CALEFFI safety relief valve 1/2" set to 2.5 bar is a compact pressure safety device intended to protect heating and hot-water systems from dangerous overpressure. The valve is designed for direct installation in domestic boilers, hot-water cylinders and small hydronic circuits where automatic pressure release is required to maintain safe operating conditions. Built to CALEFFI quality standards, this relief valve provides predictable opening at the set pressure and reliable discharge performance suited to residential and light-commercial installations.
Advantages
The valve offers consistent relief at 2.5 bar to prevent system damage from excess pressure. Its 1/2" female threaded connection enables straightforward installation on standard ports used in boilers and tanks. The design minimizes leakage and ensures stable reseating after activation, reducing the need for frequent maintenance. Materials and construction are selected for compatibility with typical heating system fluids and temperatures, providing durability in normal domestic operating conditions.
Suitable for
Domestic boilers and combi boilers
Hot-water cylinders and storage tanks
Small hydronic heating circuits and radiator systems
Pressure safety protection in light commercial plantrooms
Key specifications
Connection type: 1/2" female threaded
Set pressure: 2.5 bar (fixed)
Function: automatic pressure relief to protect against overpressure
Typical application: hydronic heating and domestic hot-water systems
Discharge orientation: outlet port suitable for downward or sideward piping to safe drain
How to use
Install the valve on the designated safety port of the boiler, hot-water cylinder or hydronic circuit using the 1/2" female threaded connection. Ensure the valve outlet is directed to a safe discharge point and fitted with suitable discharge piping or an air gap as required by local regulations. The valve is factory-set to open at 2.5 bar and operates automatically; after a discharge event, check system pressure and inspect the valve seat and connections for signs of wear or leakage. Replace the valve if reseating fails or if noticeable corrosion or damage is present.
Usage recommendations
Use this relief valve in systems where a fixed 2.5 bar set point is appropriate. Confirm compatibility with system working pressure and local safety codes before installation. Periodic visual inspection and functional checks during routine system maintenance help ensure long-term reliable operation.

## FAQ

### How much does the Safety relief valve CALEFFI 311425 1/2" 2.5 bar cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 41 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 15.07.2026 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 CALEFFI 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 CALEFFI 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/11836161/67235850_large.webp