Lochinvar & A.O. Smith 100147003 Temperature Gauge

The Lochinvar & A.O. Smith 100147003 Temperature Gauge is a critical monitoring component designed for precision thermal tracking in high-performance hydronic systems. This 2-1/2 inch dial gauge provides an accurate readout ranging from 50°F to 266°F (also rated for 0-250°F in specific applications), ensuring your boiler or water heater operates within safe thermal parameters. As a direct OEM replacement part, it is 100% identical to the GTP3000, 100146986, and GTP2002, allowing for a seamless drop-in installation without manifold modifications. Engineered for durability, this gauge is a standard component in Copper-Fin CB/CW 987 - 2067 boilers and various A.O. Smith commercial water heaters. When accuracy is non-negotiable for system balancing and troubleshooting, this mechanical temperature indicator delivers the reliable data that contractors require to maintain peak equipment efficiency and prevent overheating in demanding mechanical rooms.

• Universal Compatibility: Serves as a primary cross-reference for GTP3000 and Lochinvar 100146986, consolidating your inventory for multiple service calls.
• High-Visibility Interface: Features a clear 2.5" dial face for rapid boiler temperature monitoring in low-light environments.
• Precision Thermal Sensing: Provides accurate analog temperature readings to help prevent high-limit trips and system scaling.
• Rugged Construction: Built to withstand the vibration and thermal cycling common in commercial HVACR applications.

Is this gauge compatible with both Lochinvar and A.O. Smith units?
Yes, the 100147003 is a shared part number used across both brands, specifically for commercial water heating and boiler systems where a 2-1/2" gauge is required.

Can I use this to replace a GTP3000 gauge?
Absolutely. This unit is the exact functional and physical equivalent to the GTP3000, ensuring the same thread pitch and probe depth for a proper seal.

What is the effective temperature range for this part?
While often listed for 0-250°F applications, the technical specification for this OEM gauge allows for accurate monitoring up to 266°F, covering the standard operating window for hydronic heating.

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.