Parker 4-4-4 Slo-s Male Branch Tee 1/4 in Orfs Nptf 6000 Psi

Product Description

The PARKER 4-4-4 SLO-S is a compression tube male branch tee designed for high-pressure hydraulic and fluid-power plumbing applications. It connects a 1/4-inch outside diameter tube to a male NPTF port using an O-Ring Face Seal (ORFS) end connection, providing a leak-resistant seal without thread sealant on the face-seal side. Constructed from zinc-plated steel, this fitting handles working pressures up to 6000 psi, making it suitable for demanding industrial and mobile hydraulic circuits. Licensed plumbers and hydraulic system technicians install this type of fitting during line assembly and repair.

This branch tee is used in hydraulic circuits, fluid power systems, and high-pressure plumbing installations where a tube line must branch off a threaded port. The ORFS x NPTF end connections make it compatible with standard SAE O-Ring Face Seal tube fittings on one side and National Pipe Taper Fuel thread ports on the other. Typical applications include mobile equipment hydraulics, industrial machinery, and similar systems requiring a reliable, high-pressure branch connection at a 1/4-18 NPTF port.

Key Features

• High-pressure rating of 6000 psi for demanding hydraulic service
• ORFS end connection provides a leak-resistant face seal without pipe-thread sealant
• 1/4-18 NPTF thread conforms to the National Pipe Taper Fuel standard for pressure-tight metal-to-metal thread engagement
• 1/4-inch tube outside diameter compression connection
• Zinc-plated steel construction resists corrosion in typical industrial environments
• Male branch tee configuration allows a single port to serve two downstream lines

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and fluid-power systems using 1/4-inch OD compression tube lines and 1/4-18 NPTF threaded ports with ORFS face-seal connections.

Installation Notes

This fitting should be installed by a qualified hydraulic technician or licensed plumber familiar with high-pressure fluid-power systems. Depressurize and drain the hydraulic circuit fully before removing or installing any fittings. Inspect the O-ring on the face-seal end for damage before assembly and replace it if any nicks or flat spots are present. Follow the system manufacturer and applicable industry torque guidelines for NPTF and ORFS fittings to avoid under- or over-tightening.