# Safety thermal relief valve CALEFFI 543513 for solid fuel boilers with dual temperature sensor 3/4"

**URL:** https://aio.lv/en/product--caleffi-543513--11825875
**Data updated:** 2026-03-09 11:15 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** CALEFFI
**Manufacturer code:** 543513
**EAN:** 8016615015911
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 157.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 130.57 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--caleffi-543513--11825875

## 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

Safety thermal relief valve CALEFFI model 543513 is designed for solid fuel boilers and features a dual temperature sensor and 3/4" connection. The valve provides thermal protection by releasing excess temperature or pressure to prevent overheating. Suitable for integration into heating circuits of residential and small commercial solid fuel boiler systems.

## Long description

The CALEFFI safety thermal relief valve model 543513 is designed for solid fuel boilers and provides protection against overheating by releasing excess temperature or pressure. Equipped with a dual temperature sensor and a 3/4" threaded connection, this relief valve is intended for integration into heating circuits of residential and small commercial solid fuel boiler systems. The device responds to excessive temperature conditions, helping to maintain safe operation of the boiler and associated piping.
Advantages
This safety thermal relief valve features a dual temperature sensor for reliable detection of high temperatures and a compact 3/4" connection suitable for typical boiler fittings. The valve is engineered to activate automatically under excessive temperature or pressure, reducing the risk of damage to the boiler and the heating system. Constructed to meet functional requirements of solid fuel boiler installations, it supports straightforward integration and maintenance within existing circuits.
Suitable for (tasks / use cases)
Protection of residential solid fuel boilers against overheating
Integration into small commercial solid fuel boiler heating circuits
Safety backup in systems where temperature regulation is critical
Replacement or upgrade of thermal relief components in boiler installations
Key specifications
Application: safety thermal relief for solid fuel boilers
Sensor type: dual temperature sensor for enhanced detection
Connection size: 3/4" threaded connection
Operation: automatic activation on excessive temperature or pressure
Compatibility: designed for residential and small commercial heating circuits
How to use
Install the CALEFFI thermal relief valve into the boiler circuit at a location recommended by the boiler manufacturer and in accordance with local regulations. Connect the 3/4" threaded fitting to the designated port on the boiler or pipework, ensuring proper sealing and alignment. Verify that the dual temperature sensor is positioned as required for accurate temperature detection. After installation, perform pressure and leak tests and confirm the valve operates by testing under controlled conditions according to installation guidelines and safety standards.
Usage recommendations
Use the valve as part of a complete safety strategy: combine it with appropriate controls, expansion vessels and pressure relief devices, and follow the boiler manufacturer’s maintenance schedule. Regular inspection and testing are recommended to ensure reliable function and to replace the valve if signs of wear or corrosion appear.

## FAQ

### How much does the Safety thermal valve CALEFFI 543513 3/4" cost, and is it available for purchase?

The price is 157.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 19 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, Installment. All transactions are 100% secure and encrypted.

### Can Safety thermal valve CALEFFI 543513 3/4" 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

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