Trane GLS00891 Glasshermetic Moisture Indicator 1/2 Inch

Product Description

The TRANE GLS00891 is a glasshermetic moisture indicator designed for use in refrigerant lines on HVAC cooling systems. This sight glass assembly allows service technicians to visually inspect refrigerant flow and detect the presence of moisture in the system through a color-changing indicator element. The 1/2-inch connection size fits standard refrigerant line configurations found in residential and light commercial air conditioning equipment. Moisture indicators are a critical diagnostic component, helping technicians confirm system dryness and proper refrigerant charge conditions during service and commissioning.

The GLS00891 is suited for installation in the liquid line of split-system air conditioners and heat pumps. It is typically positioned downstream of the filter drier, giving the technician a visual reference point for system moisture content and refrigerant flow condition. Licensed HVAC technicians and refrigeration service professionals install this component as part of routine system maintenance, post-leak repair recharges, or full system commissioning on Trane and compatible equipment.

Key Features

• 1/2-inch connection size for standard liquid-line installations
• Glasshermetic sight glass construction for reliable visual inspection
• Moisture-indicating element changes color to signal presence of water in the refrigerant circuit
• Provides simultaneous refrigerant flow visibility and moisture status
• OEM Trane part for verified fit in applicable systems

Compatibility

Designed as an OEM-style replacement moisture indicator for Trane HVAC central air conditioning parts and accessories applications with a 1/2-inch refrigerant line connection.

Installation Notes

Installation and replacement of moisture indicators must be performed by an EPA Section 608 certified HVAC technician, as the work involves opening a refrigerant circuit. Recover all refrigerant from the system before removing the existing sight glass to comply with EPA regulations and prevent refrigerant release. Ensure all braze connections or fittings are leak-tested after installation and before recharging the system. Consult the equipment manufacturer service manual for proper line isolation and evacuation procedures prior to installation.

Technical Specifications

• Connection Size: 1/2 inches
• Component Type: Glasshermetic Moisture Indicator

Standard Information

• Brand: TRANE
• Manufacturer Part Number: GLS00891