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The PARKER A4MRS2-MG is a push-to-connect male swivel run tee tube fitting designed for tube-to-pipe connections in fluid and pneumatic systems. Manufactured from POM (polyoxymethylene), a rigid engineering-grade thermoplastic, this fitting accepts 1/4 inch OD tubing and connects to a 1/8 inch NPTF male thread port. The swivel run tee configuration allows inline branch connections while the swivel feature simplifies alignment during installation. Rated to 300 psi, it is suited for low-to-medium pressure applications in compressed air, instrumentation, and general-purpose fluid lines. Licensed plumbers, HVAC technicians, and fluid system installers working with push-connect tubing assemblies are the primary installers.
This fitting is used in residential and light commercial applications where push-to-connect convenience is required on a tee configuration. Typical scenarios include instrumentation panels, pneumatic control circuits, and light-duty compressed air distribution where 1/4 inch OD tubing must branch off a run while also connecting to a 1/8 inch NPTF threaded port. The gray POM body is chemical-resistant and suitable for dry air, water, and many non-aggressive fluids. It is not intended for high-temperature steam or aggressive solvent service.
Designed as an OEM-style push-to-connect fitting for systems using 1/4 inch OD tubing and 1/8 inch NPTF threaded ports in pneumatic or fluid distribution applications.
Installation should be performed by a qualified technician familiar with push-to-connect fitting systems. Depressurize and de-energize the system completely before removing or installing any fitting. Ensure tubing is cut cleanly and squarely with no burrs before inserting into the push-connect collet. Verify NPTF thread engagement is adequate and apply thread sealant per system requirements and applicable plumbing or pneumatic codes.
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