# VIEGA transition coupling sleeve 28 mm x 3/4" bronze (model 104139)

**URL:** https://aio.lv/en/product--viega-104139--11831777
**Data updated:** 2026-03-09 14:42 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** VIEGA
**Manufacturer code:** 104139
**EAN:** 4015211104139
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.49 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 10.32 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--viega-104139--11831777

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 21.07.2026 | free |
| Pickup points | 24.07.2026 | 1.89 EUR |
| Courier delivery to door | 24.07.2026 | 4.99 EUR |

## Summary description

VIEGA transition coupling sleeve 28 mm x 3/4" in bronze (104139) is a pipe fitting designed to connect a 28 mm copper or plastic pipe to a 3/4" threaded connection. The coupling provides a secure transition between different pipe dimensions, suitable for domestic heating, water supply and plumbing repairs. Constructed in bronze for corrosion resistance and durability.

## Long description

The VIEGA transition coupling sleeve 28 mm x 3/4" bronze is a pipe fitting designed to join a 28 mm copper or plastic pipe to a 3/4" threaded connection. Made from bronze, the coupling offers corrosion resistance and mechanical strength for use in domestic heating, water supply and general plumbing repair tasks. Its compact design facilitates installation in confined spaces and provides a reliable transition between different pipe dimensions.
Advantages
The bronze construction resists corrosion and provides long-term durability in potable water and heating systems. The coupling’s dimensions ensure a secure mechanical connection between a smooth 28 mm pipe and a 3/4" threaded fitting, reducing the risk of leaks when installed correctly. Its compact form and standard thread compatibility allow it to be used with common plumbing components and fittings.
Suitable for
Connecting 28 mm copper or plastic pipes to 3/4" threaded valves and fittings
Domestic heating system installations and repairs
Water supply lines and plumbing maintenance
Retrofitting or adapting pipework where pipe size transition is required
Key specifications
Material: bronze, chosen for corrosion resistance and mechanical strength
Connection A: designed for 28 mm smooth pipe insertion or compression-style connection
Connection B: 3/4" external/internal thread compatibility for standard threaded fittings
Application: suitable for potable water and heating systems under normal operating conditions
Design: compact coupling sleeve for installation in limited spaces
How to use
Prepare the 28 mm pipe end by cutting squarely and deburring to ensure a clean fit. Insert the pipe into the 28 mm side of the coupling to the required depth, securing it according to the type of pipe (e.g., soldering or compression method if applicable). Screw the 3/4" threaded side to the mating fitting or valve using appropriate sealant or tape on the threads if required for the application. After assembly, pressurize the system and check all joints for leaks, tightening further if necessary within recommended torque limits for the connected fittings.
Usage recommendations
Use appropriate sealing materials on threaded connections and follow local plumbing codes. Verify material compatibility with the fluids and temperatures in the system. For installations in potable water systems, ensure components meet applicable sanitary regulations. If unsure about the correct joining method for the 28 mm pipe type, consult product documentation or a qualified installer.

## FAQ

### How much does the VIEGA transition coupling 28 mm x 3/4" 104139 cost, and is it available for purchase?

The price is 12.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 123 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 21.07.2026 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 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/11831777/67232332_large.webp