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The MIDLAND INDUSTRIES DA-3040-AA is a Type DA cam and groove reducer coupler/adapter designed for connecting hose assemblies with mismatched end sizes. It features a 3-inch female coupler on one end and a 4-inch male adapter on the other, allowing a direct size transition in a single fitting. Constructed from aluminum, this fitting handles a maximum operating pressure of 150 psi and is rated for gasket temperatures from -40 to 212 degrees F. It is commonly installed by plumbers, industrial service technicians, and fluid-handling contractors working on liquid transfer, irrigation, tank filling, and general hose management applications.
This fitting is suited for use in industrial, agricultural, and commercial fluid transfer systems where cam and groove connections are the standard coupling method. The reducer configuration makes it practical for applications requiring a step-down or step-up transition between hose or pipe sizes without additional adapters. Its aluminum construction keeps weight low while providing adequate durability for most non-corrosive fluid transfer services.
Designed as an OEM-style replacement or direct-fit component for standard cam and groove hose coupling systems using Type DA fittings in aluminum hose fitting assemblies.
Installation is performed by plumbers, irrigation technicians, or industrial fluid-handling professionals familiar with cam and groove coupling systems. Ensure all hose pressure is relieved and the fluid supply is shut off before connecting or disconnecting the fitting. Inspect the gasket for wear or damage before each use, as the gasket is the primary seal element in cam and groove connections. Follow applicable industrial hose and piping standards for the specific fluid service and pressure rating of the system.
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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