Pipe reducer UN model HP/R43P, straight reducer 40 mm to 32 mm

Pipe reducer UN model HP/R43P is a straight inline reducer designed to connect a 40 mm pipe to a 32 mm pipe. The component provides a reliable diameter transition that preserves flow continuity and supports a compact installation profile. It is suitable for systems where a reduction in pipe size is required without changing alignment or flow direction.

Advantages

The straight reducer offers a smooth internal profile to minimise turbulence and pressure loss at the change of diameter. Its compact design enables inline installation in confined spaces and simplifies connection between compatible pipe materials. The reducer’s geometry supports stable flow characteristics and helps maintain system integrity where a step-down in pipe size is necessary.

Suitable for

• Plumbing installations requiring a transition from 40 mm to 32 mm pipes
• Drainage and waste systems with mixed-diameter piping
• HVAC ducting and low-pressure fluid conveyance where size reduction is needed
• Repair work or retrofitting where inline diameter alignment must be preserved

Key specifications

• Straight inline reducer with 40 mm to 32 mm diameter transition
• Compact form factor for limited-space installations
• Smooth internal profile to reduce flow disruption
• Suitable for joining compatible rigid pipes of the specified outer diameters
• Intended for use in plumbing, drainage and low-pressure HVAC applications

How to use

Install the reducer in-line between the 40 mm and 32 mm pipe ends, ensuring the mating surfaces are clean and free of debris. Use the appropriate joining method for the pipe material (for example solvent welding, mechanical couplers, or compatible fittings) and follow manufacturer guidance for connection techniques and curing times if applicable. Verify alignment before final tightening or setting, and perform a pressure or leak test according to system requirements once installation is complete.

Usage recommendations

Confirm material compatibility and the correct outer diameters of the pipes prior to installation. For pressure-sensitive systems, check maximum operating pressure and use suitable clamps or supports to avoid stress at the joint. When used in drainage or HVAC applications, ensure adequate slope and access for maintenance.