# UN adjustable elbow reducer DN 50/40 RN54 — pipe fitting, concentric reducer

**URL:** https://aio.lv/en/product--un-rn54--11963042
**Data updated:** 2026-03-11 14:04 (EET)
**Category:** Sinks & Sink Accessories
**Manufacturer:** UN
**Manufacturer code:** RN54
**EAN:** 5907484552504
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 28.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 23.96 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--un-rn54--11963042

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Adjustable elbow reducer UN RN54 DN 50/40 is a pipe fitting designed to connect and adapt pipes of different diameters (50 mm to 40 mm) with an angled elbow. The product allows adjustable alignment when joining pipelines, supports fluid or gas flow transitions, and is suitable for plumbing, HVAC, or industrial piping systems requiring diameter reduction with an angle.

## Long description

Adjustable elbow reducer UN RN54 DN 50/40 is a concentric pipe fitting designed to join a 50 mm pipe to a 40 mm pipe while providing an angled elbow for directional change. The fitting combines a diameter reduction with an adjustable alignment feature to accommodate pipes that need precise positioning during installation. It is suitable for systems that carry liquids or gases and where a compact, angled transition between different diameters is required.
Advantages
The adjustable elbow reducer offers a compact solution for reducing pipe diameter while changing direction, reducing the need for multiple separate fittings. Its adjustable alignment reduces installation stress and simplifies positioning when connecting misaligned pipes. The concentric reducer profile maintains a centered flow path to minimize turbulence and support consistent fluid or gas movement through the transition.
Suitable for
Plumbing systems where a reduction from 50 mm to 40 mm is required with an angle
HVAC ducting and ventilation pipelines needing compact, angled connections
Industrial piping where space constraints require combined reduction and elbow functions
Repair and retrofit jobs where existing pipe runs require slight realignment
Key specifications
Nominal diameters: 50 mm to 40 mm concentric reduction
Type: adjustable elbow reducer (concentric)
Function: diameter reduction combined with angled elbow and alignment adjustment
Flow medium: suitable for liquids and gases
Application areas: plumbing, HVAC, industrial piping
How to use
Install the adjustable elbow reducer by sliding the corresponding pipes into the 50 mm and 40 mm ends and securing them according to the piping system's joining method (e.g., solvent welding, mechanical coupling, or sealing with appropriate clamps and gaskets). Use the adjustment feature to align the connected pipes before final tightening to ensure correct orientation and avoid strain on joints. Verify seals and test the system for leaks after installation.
Usage recommendations
Confirm material compatibility with the medium in use and follow standard safety and installation practices for the piping system. Ensure correct joinery method for the pipe material, maintain accessible joints for inspection, and pressure-test the line where applicable.

## FAQ

### How much does the UN adjustable elbow reducer RN54 DN 50/40 cost, and is it available for purchase?

The price is 28.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 12 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 06.07.2026 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 UN 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 UN 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/11963042/67408819_large.webp