MAGNAPLAST internal sewer reducer HTR 110/50 mm (model 11336) for indoor drainage

MAGNAPLAST internal sewer reducer HTR 110/50 mm (model 11336) for indoor drainage is a plastic transition fitting designed to join 110 mm and 50 mm drainage pipes in household sewage systems. The reducer creates a reliable connection between larger soil pipes and smaller branch or appliance drains, enabling smooth flow and space-efficient plumbing layouts. It is suitable for use in both vertical and horizontal installations where a diameter change is required and is compatible with standard plastic drain pipes used in residential renovation and new-build projects.

Advantages

The reducer is made of durable plastic that resists corrosion and common sewage media, offering long service life in indoor drainage systems. Its compact form factor simplifies installation in confined spaces and enables tidy transitions without extensive cutting or custom fabrication. The fitting provides secure joining of dissimilar pipe diameters while maintaining proper flow characteristics and reducing the risk of leaks when installed according to guidelines.

Suitable for

• Connecting 110 mm soil or waste stacks to 50 mm branch drains
• Renovation projects where existing larger pipes must feed smaller appliances
• New residential plumbing systems with mixed-diameter drain runs
• Vertical and horizontal indoor drainage assemblies

Key specifications

• Material: durable plastic suitable for indoor sewage
• Connections: reducer transition from 110 mm to 50 mm nominal diameter
• Application area: internal/domestic drainage systems
• Installation orientation: suitable for vertical and horizontal runs
• Compatibility: designed for standard plastic drain pipes

How to use

Prepare pipe ends by cutting square and cleaning any burrs or debris. Ensure mating pipe surfaces are compatible with the reducer's connection type and, if required, use the appropriate solvent cement or rubber sealing method specified for the pipe system. Slide the reducer onto the larger pipe or into the fitting position and align the smaller pipe section to the 50 mm end. Check axial alignment and secure joints according to local plumbing codes and manufacturer recommendations to ensure a watertight connection.

Usage recommendations

Install in accessible locations where possible to allow inspection and maintenance. Avoid sharp bends immediately adjacent to the reducer to maintain flow efficiency, and follow local regulations for trap arrangements and ventilation to prevent siphoning or odor issues.