# VIEGA reducing tee 18x18x15 mm N26, copper plumbing fitting

**URL:** https://aio.lv/en/product--viega-5130r181815--11832055
**Data updated:** 2026-03-09 14:43 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** VIEGA
**Manufacturer code:** 5130R181815
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.49 €
**Prices and availability valid until:** 2026-08-17 23:59
**Price without VAT (21%):** 7.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--viega-5130r181815--11832055

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.08.2026 | free |
| Pickup points | 06.08.2026 | 1.79 EUR |
| Courier delivery to door | 06.08.2026 | 4.99 EUR |

## Summary description

Reducing tee VIEGA N26 for plumbing installations with dimensions 18x18x15 mm. Designed to join three copper pipes while reducing branch diameter from 18 mm to 15 mm. Suitable for potable water and heating systems where a stable, leak-resistant branch connection is required. Use in domestic and light commercial piping projects with compatible copper tubing.

## Long description

The VIEGA reducing tee 18x18x15 mm N26 is a copper plumbing fitting designed to join three copper pipes while creating a reduced-diameter branch. Manufactured for use in potable water and heating systems, this tee provides a compact solution for changing pipe size from 18 mm to 15 mm within a single fitting. The product is intended for installations in domestic and light commercial environments where a stable, leak-resistant branch connection is required and compatible with standard copper tubing.
Advantages
This VIEGA reducing tee is made of copper, offering corrosion resistance and long service life in common plumbing environments. Its N26 design ensures precise dimensional compatibility with 18 mm and 15 mm copper pipes, simplifying transitions between pipe sizes without additional adapters. The single-piece construction reduces the number of joints and potential leak points, supporting reliable performance in potable water and heating applications.
Suitable for
Domestic cold and hot water distribution systems
Residential and small commercial heating circuits
Piping runs where a branch reduction from 18 mm to 15 mm is required
Repairs and modifications of existing copper pipe networks
Key specifications
Material: copper
Configuration: reducing tee (two inlets/outlets of equal diameter, one reduced branch)
Connection sizes: main run 18 mm × 18 mm; branch 15 mm
Intended fluids: potable water and heating fluids compatible with copper
Typical installation environment: indoor domestic and light commercial plumbing
How to use
Prepare the copper pipes by cutting squarely and deburring the ends to ensure full insertion. Clean the pipe surfaces and the inside of the fitting to remove oxides and contaminants. Install the tee by joining the 18 mm pipes to the main run ends and inserting the 15 mm pipe into the reduced branch. Secure the joints according to the chosen joining method suitable for copper fittings—commonly soldering (capillary brazing) or approved mechanical joining techniques—following local plumbing codes and manufacturer recommendations for heating and potable water systems.
Usage recommendations
Confirm compatibility of the VIEGA reducing tee with the specific copper tube standard used in your installation and follow local regulations for potable water and heating systems. When soldering, use appropriate flux and heating methods to avoid overheating nearby components; when using mechanical connectors, ensure proper torque and sealing. Pressure-test the system after installation to verify leak-free operation before commissioning.

## FAQ

### How much does the VIEGA reducing tee N26 18x18x15 mm cost, and is it available for purchase?

The price is 8.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 34 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 03.08.2026 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 VIEGA 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 VIEGA 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/11832055/67232601_large.webp