# Copper-reducing coupling SANHA SANHA-THERM C-Stahl d28x15

**URL:** https://aio.lv/en/product--sanha-1242402815--11827918
**Data updated:** 2026-03-09 11:17 (EET)
**Category:** Home & DIY Accessories
**Manufacturer:** SANHA
**Manufacturer code:** 1242402815
**EAN:** 4021343327292
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 11.99 €
**Prices and availability valid until:** 2026-08-13 23:59
**Price without VAT (21%):** 9.91 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sanha-1242402815--11827918

## 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, model d28x15, designed for joining copper and steel pipes with a diameter reduction from 28 mm to 15 mm. Mechanical coupling for plumbing and heating installations, suitable for conveying water and heat-transfer media in residential and commercial systems. Provides a transition between differing pipe sizes and materials.

## Long description

SANHA-THERM C-Stahl reducing coupling d28x15 by SANHA is a mechanical pipe connector engineered to join a 28 mm copper pipe to a 15 mm steel pipe in plumbing and heating systems. The coupling provides a secure transition between different diameters and dissimilar materials, enabling reliable conveyance of water and heat-transfer media in residential and commercial installations. It is intended for use where a compact, mechanically fastened reduction between copper and steel lines is required.
Advantages
The SANHA-THERM C-Stahl reducing coupling offers a robust mechanical connection that accommodates a diameter reduction while maintaining hydraulic continuity. Its design facilitates a corrosion-aware transition between copper and steel pipes, reducing galvanic interaction by providing a stable, fitted joint. Installation does not require brazing or soldering on site, which saves time and eliminates open-flame procedures. The coupling is compatible with common plumbing and heating media and is manufactured to precise dimensional tolerances for consistent fit and sealing.
Suitable for
Joining 28 mm copper pipe to 15 mm steel pipe in water distribution systems
Reduced-diameter connections in central heating and radiator installations
Residential and light-commercial plumbing where dissimilar metal transition is required
Maintenance or retrofit work that requires a compact mechanical reducer without hot-work
Key specifications
Compatible pipe materials: copper (28 mm side) and steel (15 mm side)
Nominal diameters: 28 mm to 15 mm reduction
Connection type: mechanical reducing coupling for direct pipe joining
Intended media: potable water and common heat-transfer fluids used in heating systems
Typical application temperatures and pressures: suitable for standard domestic and commercial heating and plumbing ranges (refer to system design limits)
How to use
Prepare pipe ends by cutting square and removing burrs, then clean contact surfaces to ensure proper seating. Slide the coupling onto the larger or smaller pipe end as appropriate, align the pipes to maintain straight flow, and tighten the mechanical fastening according to the manufacturer's torque or assembly instructions. After assembly, verify alignment and perform a pressure test following local codes and system requirements to confirm leak-tightness before placing the system into service.
Usage recommendations
Use the coupling only with compatible pipe materials and diameters specified. For long-term performance when joining dissimilar metals, consider additional corrosion protection or isolation where required by installation standards. Follow applicable plumbing and heating regulations and perform pressure testing after installation.

## FAQ

### How much does the SANHA reducing coupling SANHA-THERM C-Stahl d28x15 cost, and is it available for purchase?

The price is 11.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 49 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/11827918/67229026_large.webp