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The LEGRIS 3126 53 00 is a push-to-connect plug fitting designed to seal off open tube ends in pneumatic and fluid transfer lines. Constructed from nylon, this fitting accepts tubing with a 1/8 inch outside diameter and holds up to 290 psi of working pressure. Installation requires no tools — the tube seats with a single push and is held by an internal collet. This type of plug is commonly installed by HVAC technicians, plumbers, and pneumatic system integrators during system maintenance, circuit testing, or line isolation procedures.
This fitting is suited for light-duty pneumatic circuits, instrumentation lines, and low-pressure fluid systems where a quick, reliable tube termination is needed. Its compact nylon construction makes it appropriate for applications where metal fittings are unnecessary or where weight and corrosion resistance are priorities. Typical install scenarios include capping unused ports during system reconfiguration or sealing branch lines taken temporarily out of service.
Designed as an OEM-style push-to-connect plug for pneumatic and fluid transfer systems using 1/8 inch OD tubing.
This fitting is installed by hand — depressurize and isolate the line before inserting or removing the fitting. Ensure the tube end is cut cleanly and squarely with no burrs before seating it into the collet. To release the tube, press the collet ring inward while pulling the tube free. Follow applicable pneumatic system codes and equipment manufacturer guidelines when working on pressurized circuits.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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