Copper bypass fitting VIEGA 15 mm model 95085 (MPN 102159)

Copper bypass fitting VIEGA 15 mm model 95085 is a 15 mm copper coupling designed to form a bypass or service loop in plumbing and heating installations. Manufactured from copper, the fitting provides a durable connection for diverting flow, creating balancing loops or enabling isolation and maintenance of sections within residential and commercial water and heating systems. The compact design suits standard 15 mm copper pipework and integrates with common soldered or press-joined connections used in heating and potable water circuits.

Advantages

The copper construction ensures corrosion resistance and long-term reliability in contact with potable water and heating media. Its dimensions are matched to 15 mm copper piping for a secure fit and consistent hydraulic performance. The simple geometry of the bypass coupling allows straightforward installation and minimal pressure drop when used as a short diversion or loop connection. Compatibility with standard joining methods supports both new installations and retrofit work.

Suitable for

• Creating bypass loops in domestic and commercial heating systems
• Diverting flow for maintenance or system balancing
• Service loops to connect gauges, valves, or temporary fittings
• Repeatable connections in potable water and closed-loop heating circuits

Key specifications

• Material: copper
• Nominal diameter: 15 mm (for 15 mm copper pipe)
• Application: bypass/coupling for water and heating systems
• Suitable joining methods: soldering or compatible press fittings (depending on system)
• Typical operating media: potable water, heating fluids

How to use

Prepare the 15 mm copper pipes by cutting square and deburring the ends. Clean the joint surfaces and apply the appropriate joining method for the installation — soldering or compatible press/joint technique as specified by the overall system. Insert the pipes fully into the bypass coupling to ensure correct engagement, then complete the joint according to the chosen method. After installation, pressure-test the circuit and check for leaks before returning the system to normal operation.

Usage recommendations

Use the fitting only with 15 mm copper pipe and joining methods that match the system’s approval and local regulations. Ensure proper pipe preparation and skilled application of soldering or pressing techniques. When used in heating circuits, verify compatibility with system temperatures and pressures and perform pressure and leak tests after installation.