VIEGA pipe reducer PRESTABO 42×22 mm fitting, model 642761

VIEGA PRESTABO reducing fitting 42×22 mm model 642761 is a press-style metal pipe connector designed for creating a compact, reliable transition between a 42 mm tube and a 22 mm tube in potable water and heating installations that use PRESTABO press connections. The fitting enables a secure mechanical connection without welding or soldering and is intended for use by professional plumbing and HVAC technicians where durable, leak-resistant joints are required.

Advantages

The PRESTABO reducer provides a high-strength metal connection that maintains flow integrity while reducing diameter. Its press-style assembly offers consistent joint quality with a reduced installation time compared to conventional joining methods. The compact design minimizes space requirements at transition points and is compatible with common system pressures in potable water and heating applications when installed according to manufacturer guidelines.

Suitable for

• Transitioning between 42 mm and 22 mm metal tubes in potable water systems
• Diameter reduction points in heating and radiator circuits
• Professional plumbing and HVAC installations using PRESTABO press technology
• Applications requiring compact, mechanically pressed joints without soldering

Key specifications

• Material: corrosion-resistant metal suitable for plumbing use
• Connection type: press-style joint compatible with PRESTABO press tooling
• Nominal diameters: 42 mm to 22 mm reduction
• Application: potable water and heating systems
• Design: compact reducer for limited-space installations

How to use

Ensure tubing ends are cut square, deburred and clean before assembly. Insert the 42 mm and 22 mm tube ends fully into the respective sides of the reducer. Verify correct positioning according to the press mark or stop feature on the fitting. Use the appropriate PRESTABO press tool and jaw sized for each diameter to perform the press operation, following the tool manufacturer's instructions and the fitting manufacturer's installation guidelines to achieve a complete and leak-resistant joint.

Usage recommendations

Follow local plumbing codes and the VIEGA installation instructions. Use certified PRESTABO press equipment and inspect completed joints for conformity. Do not use the fitting in systems with media or temperatures outside the manufacturer's specified limits; when in doubt, consult technical documentation or a qualified installer.