The Rheem-Ruud 68-21812-04 Fiberglass Gasket is a genuine OEM replacement part engineered for critical sealing applications within high-efficiency HVAC systems

Proper installation ensures optimized sequential control and prevents the overshoot often seen in aged pneumatic hardware

providing direct-fit replacement parts that restore the seal between the gauge glass and the valve body

Key Benefits for HVAC Professionals Precision Thermal Protection: Calibrated to trip at exactly 248°F to prevent catastrophic component failure

or a malfunctioning blower motor that prevents adequate heat dissipation

Cleveland Control AFS-181-43 Switch The Rheem-Ruud 68-21812-04 Fiberglass GasketThe Cleveland Controls AFS 181 43 is a professional grade air flow switch engineered for high accuracy pressure sensing in HVAC, industrial air handling, and process control applications. Functioning as a Single Pole Double Throw (SPDT switch), this unit is designed to monitor positive, negative, or differential air pressure. It features a field adjustable setpoint range of 0. 05" . 02 to 2. 0" w. c., allowing for precise calibration to meet specific