# Thermostatic liquid-filled radiator valve head CALEFFI 204000 – liquid sensor, manual setpoint

**URL:** https://aio.lv/en/product--caleffi-204000--11699801
**Data updated:** 2026-03-08 08:45 (EET)
**Category:** Heating Radiators
**Manufacturer:** CALEFFI
**Manufacturer code:** 204000
**EAN:** 8016615350586
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 22.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 18.59 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--caleffi-204000--11699801

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Liquid-filled thermostatic radiator valve head CALEFFI 204000 is a replacement control head designed for use with compatible thermostatic valves. It uses a liquid sensor to react to ambient temperature and provides manual setpoint adjustment for room temperature control. Suitable for domestic and commercial heating systems to regulate radiator flow and maintain comfort levels.

## Long description

CALEFFI 204000 thermostatic liquid-filled radiator valve head is a compact control element designed to regulate room temperature by sensing ambient conditions with a liquid-filled capsule. It replaces compatible manual thermostatic heads and provides straightforward temperature control for domestic and light commercial radiator systems. The device operates by expanding or contracting the internal liquid sensor, which drives the valve mechanism to modulate radiator flow and maintain the selected setpoint.
Advantages
The liquid sensor offers stable and precise response to room temperature variations, reducing oscillation and improving thermal comfort. Manual setpoint adjustment allows users to set a specific target temperature without relying on electrical power, which makes the head suitable for installations where simple, reliable mechanical control is preferred. Its compact design and compatibility with standard thermostatic valves facilitate straightforward replacement and retrofit in existing heating circuits.
Suitable for
Replacement of compatible radiator thermostatic heads in residential heating systems
Manual temperature control in apartments, houses and small commercial premises
Retrofit projects for balancing and regulating radiator flow
Hydronic heating systems where mechanical, non-electric control is required
Key specifications
Control principle: liquid-filled temperature sensor reacting to ambient temperature
Adjustment: manual setpoint control for room temperature
Installation: direct mounting on compatible thermostatic valve bodies
Operation: mechanical, no external power required
Application: radiators in domestic and light commercial heating systems
How to use
To install, remove the existing thermostatic head from the valve body and place the CALEFFI liquid-filled head onto the valve spindle, securing it according to the valve manufacturer’s mounting instructions. Rotate the setpoint knob to the desired room temperature. The liquid sensor will expand or contract in response to ambient temperature, moving the internal mechanism to open or close the valve and regulate radiator flow. Periodically check mounting tightness and ensure the sensor capsule is exposed to room air rather than being blocked by curtains or furniture for accurate sensing.
Usage recommendations
Position the head where it can sense room temperature accurately—avoid direct sunlight, drafts or placement behind radiators. For consistent performance, use the head with valves and adapters recommended by the radiator or valve manufacturer and follow regular maintenance checks as part of the heating system service schedule.

## FAQ

### How much does the Thermostatic liquid valve head CALEFFI 204000 cost, and is it available for purchase?

The price is 22.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 441 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 06.07.2026 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/11699801/67083044_large.webp