Tecmark Sequencing Switch [SAS105] (SAS-105) is a Tecmark replacement air switch or control switch component for compatible spa, bath, and equipment control applications. These switches are commonly used where pneumatic control, latching action, momentary operation, or sequencing functions are part of the system design. Replacing a worn or failed switch can help restore dependable response from pumps, blowers, lights, or other connected equipment when the system is configured for this style of control. Because air switches and sequencing switches can vary by pole configuration, amperage, function, and connection style, it is important to verify the original switch markings and part number before ordering. Replacement Tecmark switch component for compatible control systems Supports pneumatic, latching, momentary, or sequencing control functions as specified Useful for service repairs involving non-responsive or inconsistent controls Verify switch type, rating, and wiring configuration before installation Part number SAS-105 helps match the correct service replacement