Residential Thermostat (Aquastat) Kit for Weil McLain Indirect and Gold Plus Water Heaters

Weil-McLain 633-900-130 Thermostat Kit – For Indirect and Gold Plus Water Heaters

The Weil-McLain 633-900-130 Thermostat Kit is designed for use with Weil-McLain indirect-fired water heaters, including Plus 30-60 and Gold Plus 30-80 models. This control component allows for accurate temperature regulation within a preset range, contributing to stable hot water delivery and overall system efficiency.

This kit includes a temperature adjustment control knob and is calibrated to operate within a range of 90°F to 160°F. Engineered to meet OEM specifications, it is suited for both new installations and replacement applications where factory-matched components are required.

Key Features

• Application-Specific Design – Compatible with Weil-McLain Plus 30, 40, 60 and Gold Plus 30, 40, 60, 80 indirect water heater models
• Adjustable Temperature Range – Setpoint range from 90°F to 160°F for customized hot water control
• OEM Replacement Part – Direct fit component designed to meet manufacturer standards
• Includes Control Knob – Kit contains replacement knob for temperature adjustment
• Reliable Construction – Designed for consistent performance under typical operating conditions

Technical Specifications

• Model: 633-900-130
• Control Type: Thermostat with adjustable knob
• Temperature Range: 90°F – 160°F
• Use With: Weil-McLain Plus and Gold Plus Series indirect water heaters
• Included Components: Thermostat and control knob

Installation Guidelines

This thermostat kit should be installed by qualified personnel in accordance with local plumbing and mechanical codes. Correct sensor placement and secure electrical connections are essential to ensure accurate temperature regulation and safe operation. Always isolate power and water supply before performing service.

Contractor Notes

The 633-900-130 is designed to integrate with factory-configured control systems on compatible Weil-McLain indirect water heater models. It offers consistent setpoint control and is ideal for service professionals performing scheduled maintenance or component replacement on OEM systems.