Seal-tite 233-0604 Short Reducer 6x4 Inches No Crimp

Product Description

The SEAL-TITE 233-0604 is a short duct reducer fitting designed to transition from a 6-inch diameter duct to a 4-inch diameter duct without requiring a crimped connection. This fitting is used in forced-air HVAC ductwork systems where a straight, compact reduction in airflow diameter is needed between two duct sections. Its no-crimp design allows for a clean, tool-free slip fit during assembly, reducing installation time on residential and light commercial air distribution jobs. HVAC installers and sheet metal mechanics rely on this type of reducer to manage airflow routing efficiently within supply or return trunk systems.

This reducer is suited for residential and light commercial HVAC duct installations where a short, direct transition between a 6-inch and 4-inch round duct run is required. It is commonly installed at branch takeoffs, inline transitions, or wherever a reduction in duct diameter is needed in tight spaces. The compact length makes it practical in confined duct chases, attic runs, and mechanical room layouts where a long conical reducer would not fit.

Key Features

• Transitions from 6-inch inlet to 4-inch outlet diameter in a short-body profile
• No-crimp design allows slip-fit assembly without additional tooling
• Compact form factor suits installations in tight or confined duct spaces
• Compatible with standard round sheet metal and flex duct connections

Compatibility

Designed as an OEM-style replacement and standard fitting for residential and light commercial round duct systems requiring a 6-inch to 4-inch short reducer transition.

Installation Notes

Installation is typically performed by a licensed HVAC technician or qualified sheet metal mechanic. Shut down the air handling unit and confirm the system is de-energized before modifying any duct section. Secure connections with appropriate duct tape, mastic sealant, or mechanical fasteners per local mechanical code requirements. Follow applicable SMACNA standards and local jurisdiction requirements for duct sealing and support.

Technical Specifications

• Inlet Diameter: 6 inches
• Outlet Diameter: 4 inches
• Connection Type: No crimp slip fit
• Profile: Short reducer

Standard Information

• Brand: SEAL-TITE
• Manufacturer Part Number: 233-0604