# Safety Relief Valve CALEFFI 3/4" 3 bar model 311530 for heating and plumbing systems

**URL:** https://aio.lv/en/product--caleffi-311530--11836311
**Data updated:** 2026-03-09 14:49 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** CALEFFI
**Manufacturer code:** 311530
**EAN:** 8016615003642
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.49 €
**Prices and availability valid until:** 2026-07-10 23:59
**Price without VAT (21%):** 14.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--caleffi-311530--11836311

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Safety relief valve CALEFFI model 311530, 3/4" connection, set to 3 bar. Designed to protect heating and plumbing installations by discharging excess pressure. Suitable for domestic and light commercial systems where pressure relief at 3 bar is required. Compact brass construction, intended for installation on boilers, expansion vessels and pipework to ensure safe system operation.

## Long description

Safety Relief Valve CALEFFI 3/4" 3 bar model 311530 is a compact brass safety device designed to protect heating and plumbing systems by releasing excess pressure at a preset value of 3 bar. Intended for use on boilers, expansion vessels and pipework, this valve provides a reliable pressure relief function in domestic and light commercial installations. The 3/4" connection allows straightforward integration into standard system layouts while the brass construction offers corrosion resistance and durability suitable for routine system conditions.
Advantages
The valve opens at the preset pressure of 3 bar to discharge excess fluid and prevent overpressure situations. Its compact brass body and standardized 3/4" connection enable simple installation in tight spaces and compatibility with common pipe fittings. The design minimizes leakage under normal operating pressure and provides dependable operation when system pressure exceeds the setpoint. Constructed for repeated service cycles, the valve contributes to safe operation of heating and plumbing equipment.
Suitable for
Domestic and residential central heating systems
Small commercial heating installations
Boilers and hot water heaters
Expansion vessels and associated pipework
Plumbing systems requiring a 3 bar pressure relief device
Key specifications
Nominal set pressure: 3 bar
Connection size: 3/4" (female thread)
Material: brass body
Function: automatic pressure relief / safety discharge
Application temperature range: suitable for typical heating and potable hot water temperatures (consult system requirements)
Installation position: oriented according to piping layout; provides vertical or angled discharge depending on site configuration
How to use
Install the safety relief valve on the designated discharge point of the boiler, expansion vessel or pipework where pressure protection is required. Ensure the 3/4" connection is properly sealed with appropriate thread sealant or tape and tighten to the recommended torque for brass fittings. The valve should remain accessible for inspection and periodic testing. Once installed, the valve operates automatically: if system pressure rises above 3 bar, the valve discharges fluid until pressure returns below the setpoint. After discharge, the valve reseats to restore normal operation.
Usage recommendations
Fit the valve in a visible and accessible location and route the discharge to a safe drain point. Verify compatibility with system fluids and operating temperatures before installation. Periodically inspect for signs of leakage, corrosion or blockage and test according to local standards and manufacturer guidance to ensure reliable operation. Replace the valve if it shows persistent leakage or mechanical wear.

## FAQ

### How much does the Safety Relief Valve CALEFFI 3/4" 3 bar 311530 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 — 46 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 03.07.2026 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/11836311/67235976_large.webp