# Adapter for CALEFFI thermostat heads series 338/339/401/402/455 (model F36077)

**URL:** https://aio.lv/en/product--caleffi-r36077--11784873
**Data updated:** 2026-03-08 22:56 (EET)
**Category:** Heating Radiators
**Manufacturer:** CALEFFI
**Manufacturer code:** R36077
**EAN:** 8016615376074
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 7.43 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--caleffi-r36077--11784873

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Adaptor designed for CALEFFI thermostat heads compatible with series 338, 339, 401, 402 and 455 (model F36077). Serves to connect and mount thermostat heads to radiator valves or actuators, ensuring mechanical compatibility and secure fit. Suitable for use in hydronic heating systems for replacing or adapting existing heads during maintenance or upgrades.

## Long description

Adapter for CALEFFI thermostat heads series 338/339/401/402/455 (model F36077) is a mechanical coupling component designed to connect CALEFFI thermostat heads to compatible radiator valves or actuators. The adapter ensures correct alignment and secure attachment of the thermostat head, restoring mechanical compatibility when replacing or upgrading control heads in hydronic heating systems. It is intended for use where the original connection geometry differs or when an adapter is needed to match valve spindle dimensions.
Advantages
This adapter provides a precise mechanical fit for CALEFFI thermostat heads from the listed series, reducing play and ensuring reliable actuation of the valve stem. The component is compact and engineered for straightforward installation without modification of the valve body or thermostat head. By providing a standardized interface, it simplifies maintenance and replacement tasks, helping maintain correct temperature control performance in radiator circuits.
Suitable for
 Connecting CALEFFI thermostat heads series 338, 339, 401, 402 and 455 to compatible radiator valves
 Replacing or adapting existing thermostat heads during maintenance or upgrades
 Hydronic heating systems where valve spindle geometry requires an adapter
Key specifications
 Function: mechanical adapter for thermostat head to valve/actuator connection
 Compatibility: designed for CALEFFI thermostat head series 338, 339, 401, 402, 455
 Material and finish: durable engineered material suitable for heating system environments
 Mounting: slip-on or screw-fit interface that secures thermostat head to valve spindle
 Dimensions: compact profile to fit standard radiator valve spacing
How to use
To use the adapter, remove the existing thermostat head following the radiator manufacturer’s instructions, align the adapter with the valve spindle or actuator drive, and attach it securely according to the adapter’s mounting method. Once the adapter is fixed, mount the CALEFFI thermostat head onto the adapter ensuring correct orientation and engagement. Verify that the thermostat head actuates the valve stem smoothly by turning the head through its range and checking for consistent movement.
Usage recommendations
Before installation, confirm compatibility between the adapter and the specific valve model. Perform installation with the heating circuit isolated if required and follow safety guidelines for system maintenance. Check movement and sealing after fitting and retest temperature control to ensure correct operation.

## FAQ

### How much does the Adaptor CALEFFI F36077 for thermostat heads series 338–455 cost, and is it available for purchase?

The price is 8.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 02.07.2026 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/11784873/67180994_large.webp