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

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.