Reducing nipple INVENA ZO-21-403, galvanized steel, 3/2 x 1"

INVENA reducing nipple ZO-21-403 is a galvanized steel threaded fitting designed to connect pipes of different diameters in plumbing and heating systems. The fitting reduces from 3/2 to 1" and is intended for mechanical joining of threaded steel or compatible metal pipes. A zinc coating provides basic corrosion resistance suitable for potable water, heating circuits and general utility installations where a threaded reduction is required.

Advantages

The galvanized steel construction delivers mechanical strength and a protective zinc layer that helps resist rust and surface corrosion in wet environments. Threaded ends enable straightforward assembly and disassembly without specialized welding equipment, while the compact nipple form minimizes space requirements at the connection point. The design supports standard threaded pipe systems and allows reliable reduction between different pipe diameters.

Suitable for

• Reducing threaded connections in potable water supply lines
• Connecting pipe sections in central heating systems
• General plumbing repairs and modifications
• Temporary or permanent threaded joints in utility installations

Key specifications

• Material: galvanized steel
• Connection type: threaded nipples
• Size reduction: 3/2 x 1" (reducer configuration)
• Surface finish: zinc-coated for corrosion resistance
• Application fluids: potable water, heating media, general utility fluids

How to use

Prepare both mating threaded pipe ends by cleaning threads and, if required, applying an appropriate pipe sealant such as PTFE tape or thread compound rated for the intended fluid. Hand-start the nipple into the larger diameter pipe, then tighten with a suitable wrench until a secure, leak-minimizing joint is achieved; avoid over-tightening to prevent thread damage. Finally, assemble the smaller diameter pipe onto the opposite end using the same process and test the system for leaks under operating pressure.

Usage recommendations

Verify compatibility of the reducing nipple with the pipe material and fluid type before installation. Use recommended thread sealants for potable water systems and follow local plumbing codes. For installations exposed to aggressive environments or where long-term corrosion resistance is critical, consider additional protective measures or alternative materials.