# Reducing coupling SANHA SANHA-THERM C-Stahl d42x28 – steel pipe connector for 42 mm to 28 mm

**URL:** https://aio.lv/en/product--sanha-1242404228--12397031
**Data updated:** 2026-04-27 22:29 (EEST)
**Category:** Home & DIY Accessories
**Manufacturer:** SANHA
**Manufacturer code:** 1242404228
**EAN:** 4021343327353
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.49 €
**Prices and availability valid until:** 2026-08-13 23:59
**Price without VAT (21%):** 14.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sanha-1242404228--12397031

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.07.2026 | free |
| Pickup points | 04.08.2026 | 1.89 EUR |
| Courier delivery to door | 04.08.2026 | 4.99 EUR |

## Summary description

SANHA-THERM C-Stahl reducing coupling by SANHA (mpn 1242404228, EAN 4021343327353) is a steel pipe connector designed to join a 42 mm line to a 28 mm line. Intended for heating and plumbing installations, it provides a reliable mechanical transition between different pipe diameters and is suitable for systems using SANHA C-Stahl components.

## Long description

SANHA-THERM C-Stahl reducing coupling d42x28 is a steel connector designed to join a 42 mm pipe to a 28 mm pipe in heating and plumbing systems. Manufactured to integrate with SANHA C-Stahl components, the coupling provides a mechanical transition between different outer diameters while maintaining a stable, metal-to-metal connection suitable for hot water and central heating circuits.
Advantages
The steel reducing coupling offers high mechanical strength and durability under typical operating temperatures for heating installations. Its solid metal construction ensures low deformation and secure joining of dissimilar pipe diameters. The coupling is compatible with standard C-Stahl fittings and is suitable for professional plumbing work where a robust, long-lasting connection is required.
Suitable for
 Transitioning a 42 mm steel heating line to a 28 mm steel heating or hot water line
 Central heating distribution manifolds and radiator connections
 Plumbing and mechanical installations using SANHA C-Stahl components
 Repair or modification of existing steel pipe networks
When it may not be suitable
The reducing coupling is intended for steel C-Stahl systems and may not be appropriate for use with non-steel pipe materials unless compatible adapters or transition fittings are used. It is not a direct replacement for press- or solder-type fittings designed for copper, plastic, or other materials without verifying mechanical and sealing compatibility.
Key specifications
 Material: steel (C-Stahl)
 Connection sizes: 42 mm to 28 mm outer diameter
 Application: heating and plumbing systems
 Compatibility: designed for C-Stahl piping and fittings
 Typical use: mechanical coupling for distribution and radiator lines
How to use
Prepare pipe ends by cutting square and deburring to ensure proper seating. Align the 42 mm and 28 mm pipe ends with the coupling and assemble according to SANHA C-Stahl connection practice; use the recommended fastening or joining method for the particular C-Stahl system in use. After assembly, inspect the joint for correct fit and perform pressure testing in accordance with local standards and installation rules to verify the integrity of the connection.
What to consider before purchase
 Confirm that your system uses C-Stahl (steel) components and that 42 mm and 28 mm are the correct outer pipe diameters
 Verify the required joining method and whether additional seals, adapters, or tools are needed
 Ensure operating pressure and temperature ranges of your system are compatible with steel fittings
Usage recommendations
Use the reducing coupling in accordance with SANHA installation instructions and applicable plumbing codes. After installation, perform a pressure test and visually inspect the joint periodically as part of routine system maintenance to ensure long-term reliability.

## FAQ

### How much does the Reducing coupling SANHA SANHA-THERM C-Stahl d42x28 cost, and is it available for purchase?

The price is 17.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 30.07.2026 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 SANHA 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 SANHA 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/12397031/68680610_large.webp