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The PARKER 170HD-6-6 is a brass compression tube female elbow fitting designed for connecting tubing to female NPT-threaded ports at a 90-degree angle. It accepts a compression-style tube end on one side and a 3/8 inch female pipe thread (FNPT) on the other, creating a reliable, leak-resistant joint without soldering or brazing. Rated to 1500 psi maximum working pressure, this fitting is built for demanding fluid and gas service environments. Plumbers, HVAC technicians, and mechanical contractors use this type of fitting when routing copper or compatible tubing into threaded manifolds, valves, or equipment ports.
This fitting is suited for residential and light commercial plumbing, refrigeration, and HVAC applications where a direction change is needed between a compression tube run and a female NPT connection point. It is commonly installed in water supply lines, instrument tubing, and refrigerant or gas piping systems where a 90-degree transition from tubing to threaded pipe is required. The all-brass construction makes it appropriate for potable water, compressed air, and compatible gas service depending on local code requirements.
Designed as an OEM-style replacement or new-installation compression tube female elbow for systems using 3/8 inch FNPT-threaded ports with compression tube connections in plumbing, HVAC, and fluid handling applications.
Installation is performed by licensed plumbers or qualified HVAC technicians. Shut off and depressurize the supply line before removing or installing any compression fitting. Hand-tighten the compression nut onto the tube end, then advance with a wrench per standard practice — do not overtighten, as brass compression ferrules can be deformed. Verify local code compliance (IPC or applicable mechanical code) for approved use in potable water or gas service before installation.
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