SANHA flat union U2 type threaded female-male, galvanized, 1½"

SANHA flat union U2 type threaded female-male in galvanized finish, nominal size 1½", is a mechanical pipe fitting designed to join two threaded pipe ends with a flat sealing face. The flat-faced union enables a removable, leak-tight connection between metal pipes, allowing sections to be disassembled without rotating the attached piping. The galvanized surface provides basic corrosion resistance suitable for many installation environments in plumbing, heating and general industrial systems.

Advantages

The flat sealing face ensures a reliable mechanical seal when assembled with appropriate gasket or seal materials and correct tightening torque. The gendered threaded design (female-to-male) simplifies coupling of differing thread orientations and supports straightforward installation and future maintenance. Galvanized finish offers durability against mild corrosion and is compatible with common metal piping materials, providing a cost-effective option for systems that require removable unions.

Suitable for

• Plumbing systems for potable and non-potable water supply where removable connections are needed
• Heating installations where sections of pipework require periodic disassembly for maintenance
• Industrial metal piping systems that use threaded connections and expect occasional rework or replacement
• Retrofit projects where existing threaded pipes must be joined without rotating long pipe runs

Key specifications

• Type: flat union, U2 series
• Connection: threaded female-to-male
• Material/finish: galvanized metal
• Nominal size: 1½"
• Sealing face: flat

How to use

Inspect both mating thread ends and the flat sealing face for cleanliness and damage before assembly. Apply an appropriate sealing method if required by the system (for example, compatible gasket, PTFE tape or jointing compound suited to flat unions and the conveyed medium). Hand-start threads to avoid cross-threading, then tighten to the recommended torque for the pipe size and material until the flat sealing face is compressed sufficiently to form a leak-tight joint. When disassembling, support piping to avoid undue stress on nearby fittings and unscrew the union to separate sections.

Usage recommendations

Use the union within the pressure and temperature limits of the piping system and with gasket or seal materials compatible with the conveyed fluid. Avoid exposure to aggressive chemicals or environments that exceed the corrosion resistance of galvanized finishes. For potable water and critical systems, confirm material compatibility and, if necessary, choose unions with appropriate certifications or alternative finishes.