Description
Auburn H4-12-12PK Red Line Gauge Glass Overview
The Auburn H4-12-12PK is a 5/8″ outer diameter red line gauge glass tube designed for boiler and hydronic system sight glass assemblies. Measuring 12 inches in length and supplied in a convenient 12-pack, this gauge glass provides clear, reliable visual indication of fluid levels in steam boilers, hydronic heating systems, and other pressurized vessels.
Key Features
- 5/8″ outer diameter red line gauge glass construction
- 12″ tube length for standard sight glass fittings
- Red line indicator for enhanced fluid level visibility
- Value-packed 12-piece quantity — ideal for service fleets and stocking distributors
- Compatible with standard boiler and hydronic sight glass assemblies
- Designed for use in steam and hot water boiler applications
Product Specifications
- Brand: Auburn
- SKU: H4-12-12PK
- Outer Diameter: 5/8″
- Length: 12″
- Style: Red Line
- Quantity: 12-Pack
Application
Red line gauge glasses are a staple replacement part for boiler rooms and hydronic heating systems. The red line running through the center of the glass tube creates a visual contrast against water, making it easy to read fluid levels at a glance — even in low-light mechanical room conditions. Keeping spare gauge glass tubes on hand is essential for any boiler service technician or facilities maintenance team.
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