# Caleffi Thermostatic Mixing Valve 3/4" with temperature adjustment range of 35 to 65 degrees Celsius

**URL:** https://aio.lv/en/product--caleffi-521900--12670046
**Data updated:** 2026-09-12 04:24 (EEST)
**Category:** Other goods
**Manufacturer:** CALEFFI
**Manufacturer code:** 521900
**EAN:** 8016615394290
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 70.99 €
**Prices and availability valid until:** 2026-10-27 23:59
**Price without VAT (21%):** 58.67 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--caleffi-521900--12670046

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 12.10.2026 | free |
| Pickup points | 15.10.2026 | 1.99 EUR |
| Courier delivery to door | 15.10.2026 | 4.99 EUR |

## Summary description

Caleffi thermostatic mixing valve featuring a 3/4" connection and an adjustable temperature range of 35 to 65 °C. Designed for plumbing and heating systems to regulate water temperature, prevent scalding, and ensure precise control. Suitable for domestic hot water installations, providing reliable performance and energy efficiency.

## Long description

The Caleffi thermostatic mixing valve 3/4" with a temperature adjustment range of 35 to 65 degrees Celsius is designed for plumbing and heating systems to regulate water temperature effectively. This device automatically mixes hot and cold water to maintain a constant and safe output temperature, preventing scalding and ensuring precise control for domestic hot water installations.
Advantages
This thermostatic mixing valve provides reliable performance and helps maintain energy efficiency in domestic water systems. By automatically adjusting the ratio of hot and cold water inflows, it delivers stable temperature output even under fluctuating supply conditions. The durable construction ensures long-lasting operation, while the wide adjustment range allows users to set the desired output temperature accurately according to their specific requirements.
Suitable for
Domestic hot water installations in residential buildings
Underfloor heating systems requiring controlled supply temperatures
Solar thermal systems integrated with domestic water heating
Bathrooms and showers to protect users from accidental scalding
When it may not be suitable
This valve may not be suitable for industrial high-flow applications that exceed the capacity limits of a 3/4" connection size. It is also not intended for closed-loop heating circuits where water temperature regulation is handled entirely by boiler controls rather than point-of-use or zone mixing.
Key specifications
Connection size: 3/4"
Temperature adjustment range: 35 to 65 °C
Application: Plumbing and heating systems
Function: Temperature regulation and scalding prevention
How to use
Installation should be performed by a qualified plumber in accordance with local plumbing regulations. The valve must be connected to both the hot and cold water supply lines, as well as the mixed water outlet, ensuring correct directional flow as indicated on the valve body. Once installed, the temperature can be adjusted using the top control knob to the desired setting between 35 and 65 degrees Celsius, allowing the internal thermostatic element to automatically maintain the specified level.
What to consider before purchase
Verify that the 3/4" connection size matches your existing pipework
Ensure the required operating temperature falls within the 35 to 65 °C range
Check local building codes regarding the mandatory use of thermostatic mixing valves in domestic water systems
Usage recommendations
Regularly check the valve operation and verify the output temperature to ensure consistent performance and safety in your plumbing system.

## FAQ

### How much does the Caleffi Thermostatic Mixing Valve 3/4" 35-65°C cost, and is it available for purchase?

The price is 70.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 40 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 12.10.2026 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 Caleffi Thermostatic Mixing Valve 3/4" 35-65°C 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/12670046/70081197_large.webp