Conbraco 9858P-36 Redline Glass

As a veteran contractor, you know that precise fluid level monitoring is non-negotiable for system safety. The Conbraco 9858P-36 Redline Glass is a professional-grade borosilicate gauge glass designed for high-visibility liquid level indication in steam boilers and pressure vessels. Featuring a 5/8" diameter and a 36" length, this tubular glass incorporates a distinct red line on a white background. This architectural feature creates a high-contrast optical effect that makes the liquid level "pop" even in low-light mechanical rooms, ensuring your boiler water gauge readings are accurate and immediate.

Built by Apollo Valves (Conbraco Industries), this replacement sight glass is engineered to withstand the rigorous thermal expansion and mechanical stresses common in commercial HVACR and industrial steam specialties. It is compatible with standard 5/8" OD stuffing box configurations and works seamlessly with Apollo bronze water gauges. Whether you are performing routine maintenance or a full system overhaul, utilizing this high-visibility gauge glass minimizes the risk of dry-firing or overfilling, protecting the integrity of the heat exchanger and overall system efficiency.

• Enhanced Visibility: The red line indicator magnifies the liquid level, providing 100% clarity for critical monitoring tasks.
• Industrial Durability: Crafted from premium borosilicate glass, it offers superior resistance to thermal shock and chemical erosion.
• Exact Specifications: A true 5/8" outside diameter ensures a leak-free fit when paired with EPDM or Viton gaskets in your gauge sets.
• Versatile Application: Ideal for steam heating specialties, process tanks, and liquid level verification in rigorous industrial environments.

• Can this glass be trimmed to size? Yes, while it comes in a 36-inch length, it can be precisely cut using a standard gauge glass cutter to fit shorter center-to-center valve dimensions.
• What gaskets should I use with this 5/8" glass? For standard steam applications, EPDM gaskets are typically used, while high-temperature or oil-based systems may require Viton or Graphite seals to prevent leaks at the stuffing box.
• How can I prevent the glass from breaking during installation? Ensure the top and bottom gauge valves are perfectly aligned. Avoid metal-to-glass contact and do not over-tighten the packing nuts, as this allows for natural thermal expansion.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.