Conbraco 25-501-03 Water Gauge

The Conbraco 25-501-03 Water Gauge set is a heavy-duty boiler sight glass valve engineered for critical liquid level monitoring in high-pressure steam and hydronic systems. Featuring 1/2 inch NPT male connections, these valves are cast from high-grade polished bronze to ensure structural integrity and long-term corrosion resistance in harsh boiler room environments. The assembly utilizes automatic ball checks as a standard safety feature to prevent fluid loss in the event of glass breakage. For high-temperature stability, the unit is fitted with PTFE with Hypalon stem packing and an EPDM glass seal, providing a reliable leak-proof interface. With a robust aluminum type wheel for manual operation, this gauge is rated for 400 PSI at 100??F and 200 PSI at 400??F. This makes it an essential component for technicians maintaining industrial boilers or storage tanks requiring ASME-compliant water level indicators.

• Automatic Ball Checks: Provides immediate shut-off if the gauge glass fails, enhancing mechanical room safety.
• High-Temperature Seals: The combination of PTFE, Hypalon, and EPDM ensures thermal expansion compatibility without compromising the pressure seal.
• Durable Bronze Construction: Designed to withstand steam boiler water treatment chemicals and minimize galvanic corrosion.
• Precision Aluminum Handwheel: Allows for positive shut-off and easy operation even when wearing heavy work gloves.

What is the maximum pressure rating for the Conbraco 25-501-03?
This 1/2 NPT water gauge is rated for a maximum working pressure of 400 PSI at ambient temperatures (100??F) and 200 PSI for saturated steam applications up to 400??F.

Are these valves compatible with standard 5/8 inch gauge glass?
Yes, the 25-501 series is designed to accommodate standard 5/8" OD glass tubing, which is the industry standard for most commercial liquid level gauges.

Can the ball checks be removed for low-pressure gravity systems?
While typically used for safety, if your specific application requires a free-flow gravity feed, ensure your local mechanical codes permit the use of non-ball check configurations before modification.

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.