# Safety Relief Valve with Thermal Discharge and Automatic Refill CALEFFI 544400

**URL:** https://aio.lv/en/product--caleffi-544400--4865984
**Data updated:** 2026-03-07 15:03 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** CALEFFI
**Manufacturer code:** 544400
**EAN:** 8016615015959
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 175.99 €
**Prices and availability valid until:** 2026-07-07 23:59
**Price without VAT (21%):** 145.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--caleffi-544400--4865984

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 4.99 EUR |

## Summary description

CALEFFI 544400 is a safety relief valve with thermal discharge function and automatic refill designed for hydraulic and heating systems. The valve provides controlled pressure relief combined with thermal fluid release and integrates an automatic replenishment mechanism to maintain system pressure. Suitable for protecting boilers, heat exchangers and closed-loop heating circuits where thermal discharge and automatic topping-up are required.

## Long description

CALEFFI 544400 is a safety relief valve with thermal discharge and automatic refill designed for hydraulic and heating systems. The device combines pressure relief with a thermal discharge function that evacuates heated fluid when temperature-driven expansion raises system pressure, while an integrated automatic refill mechanism restores system fluid to maintain operational pressure. The valve is intended for use in closed-loop heating circuits, boiler protection and heat-exchanger safety where controlled overpressure relief and topping-up are required.
Advantages
The safety relief valve integrates thermal discharge and automatic refill functions into a single compact unit, reducing installation space and simplifying piping. It provides reliable pressure regulation and controlled evacuation of overheated fluid to protect system components. The automatic refill feature helps maintain stable pressure without manual intervention, reducing downtime and the need for frequent checks. The design supports straightforward maintenance and can be fitted into existing systems with standard connections.
Suitable for
 Closed-loop central heating systems
 Boiler protection against overpressure and thermal expansion
 Heat exchangers and thermal oil systems requiring controlled discharge
 Hydraulic circuits where automatic topping-up is necessary
Key specifications
 Function: Pressure relief with thermal discharge and automatic refill
 Application: Hydraulic and heating systems, closed-loop circuits
 Operation: Automatic pressure relief and automatic replenishment of fluid
 Design: Compact combined valve body for relief and refill functions
 Materials: Corrosion-resistant valve components suitable for heating fluids
 Installation: Inline mounting compatible with standard heating system piping
How to use
Install the valve in the pressure line according to system design, ensuring proper orientation for thermal discharge and refill connections. Set system pressure and verify the relief setpoint in line with the system’s required maximum working pressure. Connect discharge piping to a safe drain point and ensure the refill source is properly connected and vented. After installation, perform a system pressure test and check for correct operation of the relief and refill functions during controlled heating cycles.
Usage recommendations
Use the valve in systems with compatible fluid types and within the manufacturer’s recommended temperature and pressure limits. Periodically inspect discharge and refill connections for leaks and deposits, and perform functional checks during routine maintenance to confirm reliable relief and automatic topping-up.

## FAQ

### How much does the Safety Relief Valve CALEFFI 544400 cost, and is it available for purchase?

The price is 175.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 29.06.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Safety Relief Valve CALEFFI 544400 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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/4865984/30504286_large.webp