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header-product Safety relief valve CALEFFI 1/2" 2.5 bar (model 311425)
15.99 €

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

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

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

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Short 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.
Available for order: 41 pcs.
Warranty: 2 Years
SKU: 11836161
free shipment

Cheapest with

Latvijas Pasts pakomāts

Pick-up points

Latvijas Pasts pakomāts

Cost

1.99 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
15.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
20.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 €
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Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts nodaļa
20.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
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Product information

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.

Description

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Customer reviews

Customer questions

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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.