Weil McLain, 383500630, Temperature Gauge Assembly

Weil-McLain 383500630 – OEM Pressure and Temperature Gauge Assembly for Ultra Boilers

The Weil-McLain 383500630 is a dual-function gauge assembly engineered for Ultra series gas boilers. It provides integrated analog monitoring of both system pressure and water temperature, helping contractors verify performance during operation, servicing, or commissioning. As a direct replacement component, it is designed for secure installation at factory-specified tap points.

Application and Use

This gauge is intended for use in closed-loop hydronic systems, allowing at-a-glance system diagnostics. Pressure and temperature data assist with identifying issues such as air entrainment, under-pressurization, or temperature differentials. It is essential for routine maintenance checks and supports early detection of abnormal conditions.

Key Features

• Combined Readout: Single dial displays both pressure and temperature for efficient system checks
• Back Mounting: Threaded rear connection allows for installation in confined boiler panel cavities
• OEM Specified: Pre-calibrated for Weil-McLain Ultra gas boiler applications
• Mechanical Operation: No external power required – reliable analog performance
• Includes Adapter: Supplied with reducing bushing to match system port sizing

Technical Specifications

• Manufacturer: Weil-McLain
• Part Number: 383500630
• Component Type: Pressure/Temperature Combination Gauge
• Compatibility: Weil-McLain Ultra Series Boilers
• Pressure Range: 0–75 psi
• Temperature Range: 60–320°F
• Connection: 1/4" NPT rear mount with 1/2" adapter bushing

Installation Considerations

Install only when system is depressurized and cool. Apply approved pipe sealant to threads and torque to manufacturer's specifications. Post-installation, verify dial accuracy against boiler control readings under normal operating conditions. Replacement should be handled by HVAC professionals familiar with Ultra boiler assemblies.

Contractor Notes

• Ensure model-specific compatibility before field replacement
• Use with Ultra Series internal tapping ports only – not intended for field-adapted retrofits
• Analog dial offers redundancy in case of electronic sensor failure

Summary

The Weil-McLain 383500630 gauge assembly is a critical diagnostic tool for maintaining operational oversight on Ultra gas boiler systems. Built to OEM specifications, it supports accurate analog monitoring and fits directly into factory-designated mounting points. For best results, always follow installation guidelines provided in the Ultra boiler service manual.