National Door Controls 101-lh Concealed Closer Kit Lh

Product Description

The NATIONAL DOOR CONTROLS 101-lh is a 3/4 inch offset concealed closer kit designed for left-hand door applications. This retrofit kit converts existing concealed floor checks to surface-mounted door closer configurations, neutralizing the 3/4 inch offset inherent in floor-check installations. The kit is intended for commercial door hardware technicians and locksmiths working on entryway closer systems where a concealed floor check must be brought up to a surface-mounted standard. It provides a clean, code-compliant transition between hardware generations without requiring full floor hardware replacement.

This closer kit is used in commercial and institutional door applications where existing concealed floor checks from manufacturers such as Rixson, Doromatic, and Pittco are being retrofitted to surface-mounted door closers. It is suited for left-hand door swings and addresses the mechanical offset that would otherwise cause misalignment or binding during operation. Installers working on high-traffic entryways, vestibules, and corridor doors will find this kit applicable when upgrading aging floor hardware to current surface-mounted closer systems.

Key Features

• Retrofits concealed floor checks to surface-mounted door closers
• Neutralizes 3/4 inch offset in existing floor check installations
• Left-hand door configuration
• Compatible with Rixson, Doromatic, and Pittco floor check systems
• Reduces need for full floor hardware replacement during retrofit work

Compatibility

Designed to retrofit concealed floor checks from Rixson, Doromatic, and Pittco to surface-mounted door closer configurations on left-hand doors with a 3/4 inch offset.

Installation Notes

Installation should be performed by a qualified door hardware technician or commercial locksmith familiar with door closer systems. Ensure the door is secured in the open or closed position and that all existing floor check hardware is depressurized or mechanically relieved before disassembly. Verify door hand orientation prior to installation, as this kit is specific to left-hand applications and cannot be reversed in the field. Consult applicable building codes and the door manufacturer specifications to confirm hardware compatibility before beginning the retrofit.

Technical Specifications

• Offset: 3/4 inch
• Hand: Left Hand
• Application: Concealed floor check to surface-mounted closer retrofit

Standard Information

• Brand: NATIONAL DOOR CONTROLS
• Manufacturer Part Number: 101-lh