Tapco 73089 Extension Stem Knockout 20pt X 19pt

Product Description

The TAPCO 73089 is an extension stem knockout designed to adapt between 20-point and 19-point valve stem configurations. This fitting is used when extending or connecting valve stems that differ in point count, allowing for proper mechanical engagement between components. It serves as a precision adapter in valve assemblies where direct stem-to-stem coupling would otherwise be incompatible. HVAC technicians, plumbers, and mechanical contractors working on valve replacement or retrofit applications rely on this type of stem knockout to maintain correct drive engagement and avoid slippage during valve operation.

This extension stem knockout is suited for applications involving valve stems in HVAC, plumbing, or refrigeration systems where a 20-point to 19-point transition is required. It is typically installed during valve replacement or upgrade projects where the existing actuator or valve body has a differing stem point count from the new component being fitted. Both residential and light commercial service scenarios may call for this part.

Key Features

• Adapts 20-point valve stem to 19-point connection for cross-compatible installations
• Extension design allows for stem reach adjustment during valve coupling
• Compact form factor suitable for tight mechanical assemblies
• Manufactured by TAPCO, a recognized supplier of valve and flow-control components

Compatibility

Designed as an OEM-style replacement or adapter component for valve stem assemblies requiring a 20-point to 19-point extension knockout interface. No specific model compatibility data was provided in the product input.

Installation Notes

Installation should be performed by a licensed HVAC technician, plumber, or qualified mechanical contractor. Shut off the relevant fluid or refrigerant supply and depressurize the system before disassembling any valve components. Verify point-count engagement before applying torque to avoid stem damage or stripping. Follow all applicable local mechanical codes and manufacturer guidelines for valve service procedures.

Technical Specifications

• Stem Point Configuration: 20-point x 19-point
• UPC: 040688916385

Standard Information

• Brand: TAPCO
• Manufacturer Part Number: 73089