# Purmo radiator accessory — RS extension coupling 1/2" L-20 (model 1141)

**URL:** https://aio.lv/en/product--purmo-1141--11700129
**Data updated:** 2026-03-08 08:46 (EET)
**Category:** Heating Radiators
**Manufacturer:** Purmo
**Manufacturer code:** 1141
**EAN:** 5905505261510
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 4.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--purmo-1141--11700129

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Purmo RS extension coupling (model 1141) is a radiator accessory designed for connecting or extending 1/2" threaded heating pipe connections with an L-20 length specification. Intended for use in central heating installations, this coupling provides a reliable threaded joint for radiator valves, pipework adjustments, or replacement of existing fittings. Suitable for professional plumbing or DIY radiator maintenance.

## Long description

Purmo RS extension coupling 1/2" L-20 (model 1141) is a threaded radiator accessory designed to join or extend 1/2" heating pipe connections with a length of 20 mm. It is intended for use in central heating systems where a short, reliable threaded extension is needed to adapt radiator valves, modify pipe runs, or replace worn fittings. The coupling provides a compact solution for maintaining alignment and proper thread engagement between radiator components in both new installations and repairs.
Advantages
The extension coupling offers a compact, robust threaded connection compatible with standard 1/2" radiator fittings. Its L-20 length helps achieve the correct spacing for valve installation and ensures secure engagement of existing threads. The simple mechanical design reduces installation complexity and allows straightforward replacement without the need for extensive pipe modification.
Suitable for
 Extending 1/2" threaded radiator connections by 20 mm
 Adapting radiator valves to different pipe recess depths
 Replacing damaged or corroded short couplings in heating circuits
 Professional plumbing installations and DIY radiator maintenance
Key specifications
 Connection thread size: 1/2" (threaded coupling)
 Overall extension length: 20 mm (L-20)
 Type: RS extension coupling for radiators
 Application: central heating radiator connections
How to use
Ensure the heating system is isolated and cooled before disconnecting any components. Remove the existing fitting if necessary and inspect thread condition. Hand-start the coupling onto the male or female thread, then tighten with an appropriate wrench to achieve a secure, leak-free joint without over-torquing. Refit the valve or pipework and pressurize the system to check for leaks. If thread sealant or tape is required, use materials suitable for heating systems and compatible with metal threads.
Usage recommendations
Use the coupling where a short 20 mm extension is sufficient to align radiator valves or restore proper thread engagement. Verify thread compatibility and material condition before installation, and perform a pressure test after fitting. For critical installations or uncertain thread condition, consult a professional plumber.

## FAQ

### How much does the Purmo RS extension coupling 1/2" L-20 1141 cost, and is it available for purchase?

The price is 4.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 21 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 03.07.2026 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 Purmo 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 Purmo 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/11700129/67083258_large.webp