Parker 59HD-4 Compression Tube Plug Brass 2100 Psi

Product Description

The PARKER 59HD-4 is a brass compression tube plug designed to seal the open end of a compression-style tubing line. It terminates a compression fitting run without requiring a mating tube, blocking flow and pressure in the line. Rated to 2100 psi maximum working pressure, this plug handles a wide service temperature range from -65 degrees F to 250 degrees F (121 degrees C), making it suitable for demanding fluid and pneumatic system applications. At 0.02 pounds, it is a compact, single-piece fitting installed by HVAC technicians, plumbers, and fluid-systems mechanics as part of routine service or system modification work.

This plug is used wherever a compression tubing line needs to be capped or temporarily or permanently terminated. Typical applications include HVAC refrigerant line modifications, hydraulic and pneumatic control lines, instrumentation tubing, and general-purpose plumbing where compression fittings are specified. Its brass construction provides corrosion resistance suited to water, air, and a broad range of compatible fluids across both residential and light commercial installations.

Key Features

• Compression fitting end connection for tool-free tube insertion and reliable seal
• Brass construction offers corrosion resistance and durability in wet and dry service environments
• 2100 psi maximum working pressure rating supports high-demand pneumatic and hydraulic applications
• Wide temperature range from -65 degrees F to 250 degrees F accommodates diverse service conditions
• Compact, single-unit design sold individually for precise inventory control

Compatibility

Designed as an OEM-style compression tube plug for use with standard compression-style tubing systems in HVAC, plumbing, pneumatic, and instrumentation applications.

Installation Notes

Installation is performed by a licensed HVAC technician, plumber, or qualified mechanical contractor. Depressurize and isolate the tubing line completely before removing any existing fitting or installing this plug. Hand-tighten the compression nut onto the plug body, then apply a controlled additional turn with an appropriate wrench to seat the ferrule without over-compressing it. Verify there are no leaks under operating pressure before returning the system to service.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.