# Return temperature limiter Basic RTL BOX with 3" male threaded connection

**URL:** https://aio.lv/en/product--basic-25480000001--11700309
**Data updated:** 2026-03-08 08:46 (EET)
**Category:** Underfloor Heating
**Manufacturer:** Basic
**Manufacturer code:** 25480000001
**EAN:** 4260175474686
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 73.49 €
**Prices and availability valid until:** 2026-07-04 23:59
**Price without VAT (21%):** 60.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--basic-25480000001--11700309

## 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 BOX is a return temperature limiter designed for hydronic heating systems. It features a 3" male threaded (GZ) connection and controls return flow temperature to protect boilers and optimize system efficiency. Suitable for installation in return pipes to prevent low-temperature corrosion, improve combustion and stabilize system operation in residential or light commercial heating setups.

## Long description

Basic RTL BOX is a return temperature limiter designed for hydronic heating systems. Equipped with a 3" male threaded connection, this device controls the temperature of the return flow to protect boilers and to reduce the risk of low-temperature corrosion. It helps stabilize system operation and supports improved combustion efficiency by maintaining a minimum return temperature in residential and light commercial heating installations.
Advantages
The Basic RTL BOX offers stable return temperature control without complex electronics, providing reliable passive regulation of return flow temperature. Its 3" male threaded (GZ) connection simplifies installation into existing return pipes, and the construction is suited to typical hydronic system conditions. By preventing excessively low return temperatures, the limiter helps extend boiler life and supports more consistent system performance.
Suitable for
Residential hydronic heating systems
Light commercial heating installations
Boiler protection against low-temperature corrosion
Applications requiring stabilization of return flow temperature
Key specifications
Function: return temperature limiter for hydronic heating
Connection type: 3" male threaded (GZ) connection for installation in return pipe
Operation: passive thermal control to maintain minimum return temperature
Application environment: domestic and light commercial heating systems
How to use
Install the Basic RTL BOX in the heating system return pipe using the 3" male threaded connection, following local plumbing and heating codes. Position the unit in the return line as close to the boiler as recommended by the system designer to ensure accurate control of return water temperature. Commission the system by flushing and filling according to standard procedures, then verify proper operation by monitoring return temperatures during normal heating cycles.
Usage recommendations
Use with compatible boilers and piping materials; confirm that threads and sealing methods match the installation. Regularly inspect the limiter and surrounding pipework during scheduled maintenance to ensure corrosion protection and reliable operation.

## FAQ

### How much does the Return temperature limiter Basic RTL BOX cost, and is it available for purchase?

The price is 73.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 25 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, Installment. All transactions are 100% secure and encrypted.

### Can Return temperature limiter Basic RTL BOX 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 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/11700309/67083389_large.webp