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.
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475985 | Pentair Automatic Gas Shut Off Switch For ETI 400 Heaters | 150°
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Goes with this part
CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
Other parts on the same Pentair ETi 400 Heater
The Pentair 475985 Automatic Gas Shut-Off Switch (AGS) is an OEM replacement designed for ETI 400 High-Efficiency Pool and Spa Heaters. This safety component automatically cuts off the gas supply if water temperature rises above 150°F, protecting both equipment and users from overheating hazards. By preventing unsafe operating conditions, the AGS switch plays a critical role in maintaining heater reliability and long-term performance. Built to Pentair’s specifications with durable materials, it provides consistent safety protection and ensures proper integration with ETI 400 systems. Regular inspection and timely replacement of this switch are essential for keeping your pool heating system safe and dependable.
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OEM Safety Switch: Pentair 475985 AGS is specifically designed for ETI 400 High-Efficiency Heaters, ensuring proper fit and reliable operation.
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Automatic Gas Shut-Off: Cuts off gas supply if water temperature exceeds 150°F, protecting the system from overheating and potential hazards.
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Prevents Damage: Helps avoid costly equipment failures by ensuring the heater never operates beyond safe temperature thresholds.
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Durable OEM Construction: Manufactured with high-quality materials to Pentair standards, providing reliable long-term use in pool and spa environments.
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Critical Safety Function: An essential safeguard that ensures safe operation, keeping pool heating systems compliant with safety requirements.
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Maintains System Reliability: Supports consistent heater performance by preventing unsafe operating conditions and preserving system integrity.
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Essential Maintenance Part: Replacing the AGS switch as needed helps ensure the long-term safety and efficiency of ETI 400 heaters.
- (1) Pentair 475985 AGS
- Pentair ETI 400 Heaters
