The Tecmark Sequencer Solenoid [Activated] CSC1166 (CSC-1166) is a air control component from Tecmark Corporation, intended for air button, air switch, blower, and spa air control repairs where response, trim fit, and tubing connection details must align with the original installation. This description keeps the manufacturer, category, visible attributes, and part number CSC-1166 together so the item can be reviewed quickly before ordering.Use this air control component when replacing a worn, missing, damaged, or incompatible component in a pool, spa, hot tub, or bath system. The product name should be compared against the original label, service manual, existing dimensions, plumbing connections, electrical requirements, and equipment model before installation. Important ordering details include: brand and series information retained for cross-checking.For best results, verify that Tecmark Sequencer Solenoid [Activated] CSC1166 matches the system being serviced and that all seals, gaskets, unions, cords, or related hardware are in good condition before reassembly. Installation should be completed with power disconnected where applicable and in accordance with local codes and the equipment manufacturer's instructions. Genuine-style replacement listing for Tecmark Corporation equipment and related service applications. Designed for use in the Air Switches category on compatible pool, spa, or bath systems. Helps restore proper fit, function, water movement, control response, sealing, or service access depending on the component. Match the part number, dimensions, voltage, plumbing size, finish, and equipment model before purchase. Recommended for professional service, repair, rebuild, and maintenance work where exact compatibility is required.