This SPST (Single Pole Single Throw) safety switch is engineered to interrupt the heating cycle if it detects sustained thermal exposure near the burner assembly

Streamlined Installation: Comprehensive annual maintenance kit containing all necessary OEM internal components for a single service call

a dripping or leaking vent often indicates debris accumulation or a fouled second check valve

Always verify your chiller's style letter on the nameplate before ordering

Standardized Compatibility: Direct replacement for 740-1-75 with 1" x 1-1/4" NPT connections

AERCO Boiler and Water Heater 58015-01 Maintenance Kit 340155-7026 This SPST (Single Pole SingleThe AERCO 58015 01 Maintenance Kit is a critical genuine OEM replacement solution engineered specifically for high efficiency AERCO boilers and water heaters. This comprehensive 24 month maintenance kit provides the essential components required to sustain peak thermal efficiency and ensure the long term reliability of your heating system. Designed for use with AERCO Benchmark and Innovation series units, the kit includes high quality gaskets,