Weil McLain 633900130 Aquastat Thermostat Kit

Original price was: $187.90.Current price is: $157.63.

6 in stock

SKU: 690959 Category:


The Weil-McLain 633900130 Aquastat Thermostat is a popular and reliable choice for controlling the water temperature in Weil-McLain indirect and Gold Plus water heaters. Here’s a breakdown of its key features and benefits:


  • Aquastat function: Maintains a consistent water temperature within a pre-set range, preventing overheating and ensuring efficient hot water production.
  • 90-160°F adjustable range: Offers flexibility to adjust the water temperature based on your specific needs and preferences.
  • Residential thermostat design: Easy to use with a simple knob and temperature scale.
  • Kit includes knob and instructions: Everything you need for installation and operation is included.
  • Gold Plus and Ultra Plus 30/40/60/80 compatibility: Works seamlessly with various Weil-McLain water heater models.
  • Durable construction: Built to last with high-quality materials and reliable components.


  • Improved water heater efficiency: Maintains optimal water temperature, minimizing energy waste and extending the life of your water heater.
  • Enhanced comfort and safety: Prevents scalding by ensuring consistent hot water temperature within a safe range.
  • Easy to use and control: Simple design and clear temperature markings make it user-friendly.
  • Versatility: Compatible with various Weil-McLain water heater models.
  • Reliable performance: Durable construction and proven technology ensure long-lasting operation.

Things to consider:

  • Compatibility: Ensure the thermostat is compatible with your specific Weil-McLain water heater model.
  • Temperature range: Choose the appropriate temperature range based on your hot water needs and safety considerations.
  • Installation: While generally considered a simple DIY project, consult the manufacturer’s instructions or seek professional help if needed.
  • Maintenance: Regular cleaning and inspection are recommended to maintain optimal performance.

Overall, the Weil-McLain 633900130 Aquastat Thermostat is a valuable addition to your Weil-McLain water heater, offering improved efficiency, comfort, and safety. Its user-friendly design, compatibility, and reliable performance make it a popular choice for homeowners and technicians alike.

Additional information

Weight 0.87 lbs


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