Conbraco 20-151-00 Valve

The Conbraco 20-151-00 is an industrial-grade rough bronze water gauge set designed for critical liquid level verification in boiler and hydronic systems. This 1/2" NPT water gauge features a 5/8" OD x 12" length standard glass tube, providing clear visibility of fluid levels under demanding conditions. Engineered for safety and durability, it is equipped with automatic ball checks in both the upper and lower valves to minimize fluid loss and protect personnel in the event of accidental glass breakage. The construction utilizes Teflon stem packing and an EPDM glass seal to maintain a leak-proof interface, even when subjected to thermal cycling. This Apollo 20-151-00 model is rated for 125 PSI at 350°F and up to 300 PSI at 100°F, making it a reliable choice for low-to-medium pressure steam applications. It includes a high-impact composite plastic handwheel and a 1/4" needle drain valve for simplified system blowdown and maintenance.

• Automatic Safety Shut-off: Integrated ball checks prevent catastrophic fluid release if the sight glass is compromised.
• Corrosion-Resistant Construction: Heavy-duty rough bronze body resists scaling and degradation in harsh hydronic environments.
• High-Temperature Integrity: EPDM gaskets and Teflon packing ensure long-term sealing performance at temperatures up to 350°F.
• Standardized Fitment: The 1/2" MNPT connections and standard 12-inch glass length allow for straightforward replacement in existing boiler tappings.

What is the difference between the 20-151-00 and the 20-150-00 models?
The primary difference is the handwheel material; the 20-151-00 utilizes a composite plastic wheel, whereas the 20-150-00 typically features an aluminum wheel. Both share the same bronze body and automatic ball check safety features.

Are guard rods required for this water gauge installation?
Yes, for professional installations, guard rods should be used to protect the 5/8" OD glass from physical impact. This set is designed to accommodate two standard guard rods.

Can this gauge handle high-pressure steam?
This specific model is rated for a maximum of 125 PSI at 350°F. Always verify your boiler's operating pressure and temperature against these technical specifications before installation.

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.