Conbraco 21-104-00 Water Gauge

For industrial fluid monitoring and boiler maintenance, the Conbraco 21-104-00 Water Gauge provides a reliable, high-visibility solution for real-time liquid level verification. Engineered with a rough bronze body and 1/2" NPT male connections, this gauge set is built to withstand rigorous mechanical room environments. The extended shanks allow for seamless installation on insulated vessels, ensuring the sight glass clear of lagging. Performance is secured by high-grade EPDM glass seals and a Teflon stem packing assembly, designed to eliminate fugitive emissions and leaks at high pressure and temperature. The unit includes a standard 5/8" OD x 12" length glass tube, providing sufficient visual range for standard boiler headers and tanks. With a rugged aluminum type wheel for manual isolation and a professional-grade finish, this Apollo/Conbraco water level gauge is a staple for hydronic and steam system contractors. Its ratings of 125 PSI at 350F and 300 PSI at 100F meet the requirements for most low-to-medium pressure commercial installations.

Key Benefits

• Extended Shank Design: Facilitates easy mounting on equipment with external insulation or outer jackets.
• High Durability Materials: Features a corrosion-resistant rough bronze construction and a lightweight, durable aluminum handwheel.
• Robust Sealing System: Equipped with Teflon (PTFE) stem packing and EPDM seals for superior thermal and chemical resistance.
• Clear Level Indication: The 5/8" x 12" boiler sight glass ensures easy monitoring of critical fluid levels.
• Versatile Pressure Ratings: Optimized for diverse HVACR applications, from cold water storage to high-temp steam systems.

Common Questions

What is the maximum operating temperature for these gauges?
The Conbraco 21-104-00 is rated for service up to 350°F at a reduced pressure of 125 PSI. For ambient temperature applications (100°F), it can handle up to 300 PSI.

Can I replace the glass if it breaks in the field?
Yes, the 5/8" OD replacement water gauge glass is a standard size. Ensure the system is fully depressurized and isolated using the aluminum wheels before attempting service.

Does this unit include a drain valve?
This specific 21 series set typically includes the top and bottom valves; contractors often utilize the bottom fitting's tapping for 1/4" needle drain valves to facilitate safe blowdown procedures.

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.