Pipe elbow Alkotest MK16 16x16 PEX Sigma-LI angled fitting for PEX piping

Alkotest MK16 16x16 PEX Sigma-LI angled fitting is a right-angle elbow designed for joining two 16 mm PEX pipes in potable water and heating systems. The compact 90° geometry enables neat directional changes in tight spaces and corners, making it suitable for domestic and light commercial plumbing installations that use PEX piping. Constructed for compatibility with standard 16 mm PEX lines, the elbow provides a reliable mechanical transition where a compact, angled connection is required.

Advantages

This PEX elbow offers a compact, space-saving shape that simplifies routing of pipelines in confined areas and around obstacles. Its geometry reduces stress on connected pipes at directional changes, and it is designed for compatibility with common PEX 16 mm installation practices. The fitting supports potable water and heating applications and is intended for straightforward installation with standard PEX connection methods.

Suitable for (tasks / use cases)

• Right-angle connections of 16 mm PEX supply lines in domestic plumbing
• Routing heating circuits and radiators using 16 mm PEX piping
• Neat directional changes in bathrooms, kitchens and utility rooms
• Installations in confined or corner spaces where a compact elbow is required

Key specifications

• Connection type: 90° elbow for two 16 mm PEX pipes
• Pipe diameter compatibility: 16 mm
• Application: potable water and heating systems
• Design: compact angled fitting for confined spaces and corners
• Material compatibility: designed for use with PEX piping systems

How to use

Prepare PEX pipes by cutting square and deburring the ends before assembly. Insert each 16 mm PEX pipe into the respective elbow socket according to the selected PEX connection method (crimp, clamp, push-fit or other compatible system). Ensure pipes are fully seated and any connection rings or clamps are fitted and secured to the manufacturer’s installation tolerances. Verify alignment and check for leaks after pressurising the system according to local plumbing codes.

Usage recommendations

Use with appropriately rated 16 mm PEX tubing and follow recommended installation procedures for potable water or heating circuits. Inspect connections visually and with pressure testing before putting the system into regular service. Store fittings in a dry place and protect from direct sunlight to preserve material properties.