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The 3M 7000045004 is a hose end adapter designed to connect a 1-inch threaded hose to a 1-1/4-inch internally threaded hose. This fitting serves as a transition piece between two differently sized hose connections, allowing technicians to join hoses that would otherwise be incompatible. It is a straightforward mechanical fitting suited for use in fluid transfer, dust collection, vacuum, and similar hose-based systems. Licensed tradespeople and service professionals install this adapter when adapting existing hose assemblies to equipment with different port sizes.
This adapter is well suited for applications where a 1-inch hose must mate with a 1-1/4-inch internal hose thread. Typical use cases include shop vacuum systems, portable dust collectors, and industrial or commercial fluid-transfer setups where hose sizes vary between equipment and accessories. It is sold individually and is appropriate for both field service and shop maintenance environments.
Designed as an OEM-style hose end adapter for systems requiring a transition between 1-inch and 1-1/4-inch internal hose thread fittings.
Installation is typically performed by HVAC technicians, plumbers, or maintenance professionals working with hose-based systems. Before installing or removing any hose fitting, shut off flow to the line and depressurize the system fully. Hand-tighten threaded connections first, then snug with an appropriately sized wrench — do not overtighten, as this can damage threads. Inspect threads on both the hose and the adapter for wear or damage before assembly.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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