# Thermostatic Radiator Valve CALEFFI 3/4" 402500, straight design

**URL:** https://aio.lv/en/product--caleffi-402500--11700269
**Data updated:** 2026-03-08 08:46 (EET)
**Category:** Heating Radiators
**Manufacturer:** CALEFFI
**Manufacturer code:** 402500
**EAN:** 8016615006940
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 26.99 €
**Prices and availability valid until:** 2026-07-07 23:59
**Price without VAT (21%):** 22.31 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--caleffi-402500--11700269

## 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

Straight thermostatic radiator valve CALEFFI model 402500 with 3/4" connection. Designed to regulate radiator flow and maintain set room temperature by modulating hot water supply. Suitable for central heating systems and radiator installations where compact, straight-line valve configuration is required. Used for temperature control and energy-efficient heating management.

## Long description

The CALEFFI thermostatic radiator valve 3/4" model 402500 in a straight design is a compact control valve for radiator installations. It modulates the flow of hot water through a radiator to maintain a preset room temperature, connecting directly to standard 3/4" radiator fittings. The valve is suitable for central heating systems and installations where a straight-line valve body is required for a neat, space-saving connection.
Advantages
This thermostatic valve provides precise temperature regulation by adjusting flow according to the temperature setting, helping to reduce energy consumption. The straight design simplifies installation in confined spaces and along straight pipe runs. Constructed to meet typical heating system requirements, it delivers reliable operation and straightforward maintenance while integrating with standard radiator thermostatic heads.
Suitable for
Domestic and small commercial central heating radiators
Retrofit and new radiator installations requiring a straight valve body
Rooms where individual temperature control and energy-efficient heating are needed
Key specifications
Connection type: straight inline connection for 3/4" radiator fittings
Function: thermostatic flow control for radiator temperature regulation
Compatibility: designed for standard radiator thermostatic heads and central heating circuits
Installation orientation: straight-line installation on inlet or outlet pipework
Typical use: residential and light commercial heating systems
How to use
Install the valve in the radiator inlet or outlet pipework with the straight body aligned to the pipe run, ensuring correct thread engagement and sealing according to plumbing practice. Attach a compatible thermostatic head to set the desired room temperature; the valve will modulate flow automatically to maintain that setting. Commission the system by bleeding radiators and checking for leaks, then adjust thermostat head settings as required for comfort and efficiency.
Usage recommendations
Fit with a compatible CALEFFI or like-for-like thermostatic head and check system water quality and air removal during commissioning. For best energy performance, set individual room thermostats to the lowest comfortable temperature and perform periodic inspections to ensure unobstructed valve movement and absence of leaks.

## FAQ

### How much does the Thermostatic Radiator Valve CALEFFI 402500 3/4" cost, and is it available for purchase?

The price is 26.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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. 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/11700269/67083361_large.webp