Slant Fin 410-527-000 Aquastat 30067439-890 if a vent limiting device

if a vent limiting device is installed

maintaining the exact footprint and terminal configuration required for legacy HVAC controls

Restorable ROR Element: The rate-of-rise component can be field-tested with a heat gun for routine maintenance while the fixed temperature element remains on standby

maintaining a stable 750 millivolt signal to prevent nuisance lockouts

Slant Fin 410-527-000 Aquastat 30067439-890 if a vent limiting deviceThe Slant Fin 410 527 000 Aquastat is an essential immersion temperature controller designed for hydronic HVAC systems, specifically for regulating boiler water temperature. This SPST (Single Pole Single Throw) aquastat operates within a precise range of 40F to 180F, making it ideal for maintaining low limit or circulator control in residential and light commercial applications. As a veteran grade HVAC replacement part, it is frequently used as a