Polypropylene Prestolok Plug

The polypropylene Prestolok plug is a closure fitting for pneumatic tubing systems and push-in connections where an outlet must be blocked, a line protected or a point left ready for later intervention. Its polypropylene construction makes it lightweight and practical for pneumatic panels, automation, machinery maintenance and low-complexity air networks, always validating compatibility with the tube, fluid and system working temperature. It differs from a Prestolok union because it does not join two sections: its function is to seal or terminate a connection. It also differs from a metallic threaded plug because it works with push-in geometry for tubing, not as a threaded pipe closure. At TECTUL it is quoted as a fitting by unit and confirming the tube or port outside diameter before purchase is recommended.

Selection guide

• Confirm the outside diameter of the tubing or Prestolok port where the plug will be installed.
• Validate that the polypropylene material is compatible with the environment, fluid and system cleanliness.
• Use this plug for line or port closure; do not replace it with a shut-off valve when frequent operation is required.
• If the system has vibration, check retention and tube condition during preventive maintenance.

Installation recommendations

• Cut the tubing square when the plug goes at a line end.
• Avoid scratches, deformation or dirt in the area entering the connector seal.
• Insert the plug fully into the housing so the retaining ring works correctly.
• After installation, pressurize in a controlled way and verify absence of leaks.
• To disassemble, release the retaining mechanism without pulling the tubing at an angle.

We dispatch to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp for your polypropylene Prestolok plug with TECTUL and confirm diameter, quantity and application for closing pneumatic lines or available ports.