Crimp Coupling Perfexim 733 25 x 16 mm, model 62-733-2516-000

Perfexim crimp coupling 733 25 x 16 mm (model 62-733-2516-000) is a press-fit mechanical connector designed to join pipes of different diameters in plumbing and heating systems. The coupling creates a permanent, leak-resistant joint when installed with an appropriate pressing tool and compatible pipe materials. Its stepped internal design accommodates a 25 mm pipe on one side and a 16 mm pipe on the other, enabling transitions between sizes without adapters that require additional fittings.

Advantages

This crimp coupling provides a reliable, low-profile connection that resists mechanical stress and reduces the risk of leaks compared with temporary or threaded joints. The press-fit method delivers consistent compression and a secure seal when used with the correct pressing equipment. The coupling’s compact form factor simplifies installation in confined spaces and minimizes flow disturbance at the transition between pipe diameters.

Suitable for

• Connecting 25 mm to 16 mm pipes in residential water supply systems
• Size transitions in heating and radiator circuits
• Retrofit or repair work where two different pipe diameters must be joined
• Commercial plumbing installations using compatible press-fit systems

Key specifications

• Connection type: press-fit (crimp) mechanical coupling
• Pipe diameters: 25 mm to 16 mm stepped connection
• Function: permanent, leak-resistant joint for plumbing and heating
• Installation: requires compatible pressing/crimping tool for secure seal
• Application environment: potable water, heating circuits, general plumbing

How to use

Ensure both pipes are the correct diameters and compatible with press-fit fittings. Cut pipe ends square, deburr and clean them to remove dirt and burrs. Insert each pipe fully into the appropriate end of the coupling until it seats against the internal stop. Use the specified pressing or crimping tool and jaws recommended for press-fit connections to compress the coupling at the designated locations, creating the mechanical seal. After pressing, visually inspect the joint and, if applicable, perform a pressure test in accordance with local regulations and installer guidelines.

Usage recommendations

Use only pipes and press-fit tools compatible with the coupling material and system. Follow manufacturer and local plumbing codes for pressure testing, support spacing, and thermal expansion allowances. Avoid using the coupling on damaged or excessively corroded pipe ends; replace compromised pipe sections before installation.