Find your parts diagram
Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
Still not sure? Call (818) 818-6559 and we'll find it for you.
The OEM Raypak High Limit 140F Auto Reset, model 600893B, is specifically designed for Low NOx heaters to ensure safe and efficient operation. This high limit switch automatically resets when the temperature falls below 140 degrees Fahrenheit, providing an essential safety mechanism to prevent overheating. By incorporating this component into your heating system, you ensure reliable regulation of maximum temperature limits, enhancing the safety, performance, and longevity of your Low NOx heater.
- Essential Safety Mechanism: Automatically resets when the temperature falls below 140 degrees Fahrenheit, preventing overheating and ensuring safe operation.
- Designed for Low NOx Heaters: Specifically engineered for Low NOx heaters, offering tailored safety and performance benefits.
- Reliable Temperature Regulation: Provides reliable regulation of maximum temperature limits, crucial for maintaining system integrity and performance.
- Enhances Longevity: By incorporating this switch, you enhance the longevity and durability of your heating system, reducing the risk of damage due to excessive heat.
- Improves Safety and Performance: Boosts the overall safety and performance of your heater, ensuring it operates efficiently and effectively throughout its lifespan.
- Raypak Low Nox Heaters: 207A, 267A, 337A, 407A
Note: This high limit may be compatible with your heater, please refer to your systems owners manual to ensure compatibility.

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