Parker 222P-12-6 Pipe Adapter 3/4 in Female 3/8 in Male Brass

Product Description

The PARKER 222P-12-6 is a brass pipe adapter designed to connect a 3/8 inch male NPT fitting to a 3/4 inch female NPT port. It uses a MNPTF x FNPTF connection type, providing a tapered thread-to-tapered thread seal suitable for fluid and pneumatic systems. Rated to 1,000 psi maximum working pressure, this adapter handles a wide service temperature range from -65 degrees F to 250 degrees F. It is manufactured to SAE J530 and SAE J531 standards. Plumbers, pipefitters, HVAC technicians, and industrial maintenance professionals install this fitting when reducing or adapting between mismatched thread sizes in piping assemblies.

This adapter is suited for use in hydraulic, pneumatic, fuel, and general-purpose fluid piping systems where a 3/8 inch male NPT supply or component must connect to a 3/4 inch female NPT port. Common install scenarios include pump connections, manifold adaptations, and equipment retrofits in both residential and light commercial settings. The brass construction makes it appropriate for water, air, oil, and compatible fuel service lines.

Key Features

• Reduces from 3/4 inch female NPT to 3/8 inch male NPT in a single fitting
• Rated to 1,000 psi working pressure for demanding fluid and pneumatic service
• Wide temperature range: -65 degrees F to 250 degrees F
• Brass construction resists corrosion in water, air, and compatible oil or fuel lines
• MNPTF x FNPTF tapered threads provide reliable leak-resistant sealing
• Meets SAE J530 and SAE J531 standards

Compatibility

Designed as an OEM-style replacement or direct-install brass pipe adapter for MNPTF x FNPTF piping connections requiring a 3/8 inch male to 3/4 inch female NPT thread reduction.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or qualified HVAC and industrial technicians. Always depressurize and isolate the piping system before removing or installing any fitting. Apply an appropriate thread sealant or PTFE tape to the male NPT threads before assembly. Tighten to hand-snug and advance with a wrench per standard NPT fitting practice — do not overtighten brass fittings, as excessive torque can crack the body or distort threads.