# Thermostatic return temperature limiter Basic RTL with thermostatic head and straight thermostat valve 1/2x3/4 male

**URL:** https://aio.lv/en/product--basic-25482020003--11699917
**Data updated:** 2026-03-08 08:45 (EET)
**Category:** Heating Radiators
**Manufacturer:** Basic
**Manufacturer code:** 25482020003
**EAN:** 4260175474716
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 34.49 €
**Prices and availability valid until:** 2026-07-04 23:59
**Price without VAT (21%):** 28.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--basic-25482020003--11699917

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 26.06.2026 | free |
| Pickup points | 01.07.2026 | 1.99 EUR |
| Courier delivery to door | 01.07.2026 | 4.99 EUR |

## Summary description

Basic RTL return temperature limiter combines a thermostatic head and a straight thermostatic valve (1/2x3/4 male thread) to control return-water temperature in heating systems. It regulates flow based on set temperature, protecting boilers and improving system efficiency. Suitable for radiators and central heating circuits where limiting return temperature is required.

## Long description

The Basic Thermostatic return temperature limiter (RTL) with thermostatic head and straight thermostat valve 1/2x3/4 male is designed to control return-water temperature in central heating systems. The unit combines a thermostatic sensing head and a straight valve to regulate flow to the return line, maintaining the set temperature and preventing excessively hot water from returning to the boiler. This device is suitable for installations where limiting the return temperature is required to protect heat generators and to ensure stable hydraulic and thermal behaviour of radiators and heating circuits.
Advantages
The integrated construction simplifies installation by combining the sensing element and valve in a single assembly. The thermostatic head provides automatic, temperature-dependent flow regulation, reducing the need for manual adjustment. By limiting return temperature, the RTL helps protect condensing boilers from high return-water temperatures and can improve system efficiency. The straight valve design and standardized 1/2x3/4 male connection facilitate connection to common radiator and piping configurations.
Suitable for
 Domestic and light-commercial radiator circuits where return temperature control is required
 Central heating systems with condensing boilers to maintain low return-water temperature
 Hydronic zones where preventing thermal shock or corrosion in the heat generator is important
Key specifications
 Type: thermostatic return temperature limiter with integrated thermostatic head
 Valve orientation: straight (inline) valve
 Connection: male thread 1/2 x 3/4
 Function: regulates flow to limit return-water temperature based on setpoint
 Application: radiator and central heating circuits
How to use
Install the RTL in the return pipe of the radiator or heating circuit following local plumbing codes and the system layout. Mount the device with the flow direction and thread orientation matching the piping; use appropriate sealing on threaded connections. Set the desired return temperature on the thermostatic head according to boiler manufacturer recommendations or system design values. The device will then modulate flow automatically to maintain the selected return-water temperature.
Usage recommendations
For reliable operation, check compatibility with the boiler and radiator connections before installation, and ensure the system is flushed and free of debris. Regular visual inspection and occasional functional testing of the thermostatic head are recommended. When integrating with condensing boilers, select a return temperature setpoint that supports condensing operation to maximize efficiency while respecting boiler manufacturer guidance.

## FAQ

### How much does the Basic RTL thermostatic return temperature limiter 1/2x3/4 cost, and is it available for purchase?

The price is 34.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 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 26.06.2026 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 Basic 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 Basic 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/11699917/67083118_large.webp