The TBS-317 is a latching air switch designed for spa and hot tub control systems. Made by Tecmark (also sold under Senasys and similar names), it provides safe, remote air-activated on/off switching for electrical equipment like pumps, blowers, lights, and other devices.

Specifications:

• Brand: Tecmark Corporation
• Reliable control logic — Double Pole Double Throw (DPDT) design offers alternate (latching) action to control two circuits with one switch
• 20A capacity — rated for up to 20 amps, suitable for spa pumps, blowers, lights, and similar components
• Air-activated operation — works with an air button and tube: when air pressure is applied via the tubing, the switch toggles on or off
• Barb connection accepts standard 1/8" air tubing for easy installation with most air button setups
• Threaded mount designed for a panel hole (approximately 9/16"–5/8"), ideal for spa control panels
• Durable, compact thermoplastic body with quick-connect electrical terminals for reliability in humid spa environments
• Part no. TBS-317

Returns & installation: Confirm your panel hole size and air tubing diameter match this switch before ordering, as electronic parts are non-returnable once installed. Installation should be performed with power disconnected, per your spa's service manual.

FAQ

Q: How do I know if this switch needs replacing?
A: A device that won't turn on/off via the air button, or a switch that sticks in one position, are common signs of failure.

Q: What electrical loads can this handle?
A: This switch is rated for up to 20 amps, suitable for spa pumps, blowers, and lights.