# Thermostatic valve 1/2" x 1/2" left, white, model OT3901LB1/2, no brand

**URL:** https://aio.lv/en/product--no-name-ot3901lb12--11700234
**Data updated:** 2026-03-08 08:46 (EET)
**Category:** Heating Radiators
**Manufacturer:** No name
**Manufacturer code:** OT3901LB1/2
**EAN:** 5907637356782
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 54.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 45.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--no-name-ot3901lb12--11700234

## 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 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Thermostatic valve, left-handed 1/2" x 1/2" connection, white finish, model OT3901LB1/2 from an unnamed manufacturer. Designed for control of radiator or heating circuit temperature, it fits standard 1/2" threaded fittings and provides thermostatic flow regulation. Suitable for residential and light commercial heating systems where left-hand installation is required.

## Long description

Thermostatic valve 1/2" x 1/2" left, white, model OT3901LB1/2 is a left-handed thermostatic radiator valve designed for temperature control in residential and light commercial heating circuits. It fits standard 1/2" threaded connections and provides thermostatic regulation of flow to maintain a set temperature. The valve is supplied in a white finish and is intended for installations where a left-side inlet orientation is required.
Advantages
The OT3901LB1/2 offers automatic flow regulation based on the temperature setting, enabling stable room temperatures without manual adjustment. Its left-handed 1/2" x 1/2" connection ensures compatibility with common radiator fittings and reduces the need for adapters. The white finish provides a neutral appearance that integrates with a variety of radiator styles and interior designs. The valve is suitable for straightforward replacement or new installations in typical household and light commercial systems.
Suitable for
 Control of individual radiators in residential apartments and houses
 Temperature regulation in light commercial heating systems
 Left-side inlet installations where piping approaches the valve from the left
 Replacement of existing left-handed 1/2" radiator valves
Key specifications
 Connection size: 1/2" x 1/2" (left-handed)
 Function: Thermostatic flow regulation for radiator or heating circuit
 Finish: White
 Installation orientation: Left inlet
 Typical application: Residential and light commercial heating systems
How to use
Install the thermostatic valve on the radiator or heating circuit using the standard 1/2" threaded fittings, ensuring the valve inlet is oriented to the left. Connect the valve to the pipework and to the radiator tailpiece, then fit an appropriate thermostatic head (if not integrated) and set the desired temperature position according to the head manufacturer's instructions. After installation, vent the radiator to remove trapped air and test the valve by adjusting the thermostat to confirm flow modulation and stable temperature control.
Usage recommendations
Use the valve in systems that conform to recommended operating pressures and water quality for thermostatic devices. Periodic inspection and occasional bleeding of radiators will help maintain correct operation. If replacing an existing valve, verify left-handed orientation and 1/2" threading to ensure compatibility before installation.

## FAQ

### How much does the Thermostatic valve OT3901LB1/2 1/2" left, white cost, and is it available for purchase?

The price is 54.99 € (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 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. 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 No name 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 No name 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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