Parker PT-00378 Flareless Bite-type Tube Cap 1-1/4 in

Product Description

The PARKER PT-00378 is a flareless bite-type tube cap designed to terminate or blank off tubing with a 1-1/4 inch outside diameter in hydraulic, pneumatic, and fluid-transfer line assemblies. The bite-type design uses a ferrule that deforms mechanically onto the tube wall as the fitting is tightened, creating a secure, leak-resistant seal without requiring a flared tube end. This cap is used to close off open tube ends during system maintenance, pressure testing, or when a branch is temporarily or permanently taken out of service. Licensed plumbers, pipefitters, and fluid-system technicians are the primary installers.

This tube cap is suited for use in industrial and commercial fluid-handling systems where flareless compression-style fittings are the standard connection method. Typical applications include hydraulic control lines, pneumatic distribution systems, and instrumentation tubing where a clean, pressure-capable termination is required. The fitting is sold individually and is intended for single-unit installation where an open tube end must be sealed without cutting or reflaring the existing tube.

Key Features

• Flareless bite-type design — no tube flaring required for installation
• Fits 1-1/4 inch outside diameter tubing
• Terminates open tube ends in hydraulic, pneumatic, or fluid-transfer systems
• Compression ferrule creates a mechanical seal directly on the tube wall
• Single-unit packaging — sold individually

Compatibility

Designed as an OEM-style replacement or service fitting for flareless bite-type tube fitting systems using 1-1/4 inch outside diameter tubing. Verify thread form and ferrule series compatibility with the existing fitting assembly before installation.

Installation Notes

Installation is typically performed by a licensed pipefitter, plumber, or hydraulic systems technician. Before installing this cap, depressurize the system completely and lock out or isolate all fluid supply sources per applicable site safety procedures. Tighten the cap fitting to the manufacturer-specified engagement per the fitting series standard — do not overtighten, as this can distort the ferrule and compromise the seal. Verify system integrity with a pressure test after installation before returning the line to service.