Parker PPB4TMC2 Push-to-connect Tube Stem Adapter

Product Description

The PARKER PPB4TMC2 is a push-to-connect tube stem adapter designed to transition between two different tube outside diameters in a single inline connection. Built from polypropylene, it handles pressures up to 150 psi and connects a 1/4 inch OD tube to a 1/8 inch OD tube without threading or ferrules. The push-to-connect mechanism allows fast, tool-free installation, reducing labor time on pneumatic and fluid-handling assemblies. Plumbers, HVAC technicians, and equipment service pros use this fitting wherever a quick, reliable OD-to-OD size transition is needed in low-to-medium pressure tubing runs.

This adapter suits residential and light commercial applications where polypropylene is compatible with the conveyed media. Common install scenarios include water treatment equipment, pneumatic control lines, refrigeration drain connections, and fluid distribution manifolds. The 1/4 x 1/8 inch OD size combination is a frequent requirement in compact equipment where tubing must step down in size between components without additional fittings or adapters.

Key Features

• Push-to-connect design allows tool-free, hand-insertion tube connections
• Polypropylene construction resists corrosion and is compatible with a wide range of water-based and mild chemical media
• Rated to 150 psi for reliable performance in low-to-medium pressure systems
• Transitions 1/4 inch OD tubing to 1/8 inch OD tubing in a single inline fitting
• Compact body at 1.44 x 1.44 x 0.56 inches fits in tight panel and equipment spaces

Compatibility

Designed as an OEM-style replacement push-to-connect tube stem adapter for systems using 1/4 inch and 1/8 inch OD tubing in polypropylene-compatible fluid or pneumatic service.

Installation Notes

Cut tubing square and deburr all tube ends before insertion to ensure full engagement with the push-to-connect collet and a leak-free seal. Verify the system is depressurized and drained before connecting or disconnecting the fitting. Confirm polypropylene material compatibility with the conveyed media and operating temperature range before installation. This type of fitting is typically installed by plumbers, HVAC technicians, or equipment service technicians following applicable system codes.