You are buying a Teckmark Little General 3000 Series 25Amp Pressure Switch, Stainless Steel with a 1/8th" MPT Standard Threads and 2 Spade connectors for attaching the 2 wire connections. The 3029 is rated at 25 amps which allows this switch to be used in many different setups. Even for systems that have the hot wire to the heater running through the pressure switch like we see in older 115 volt plug in spas.

This versatile field adjustable pressure switch will fit Balboa, Gecko, ACC, Hydroquip, Len Gordon, Maddox, Len Gordon and many more. Makes a great replacement for the Balboa 30408 and 30409 private labeled switches.

What goes wrong with these switches? Either the Switch does not close when the pump comes on and puts pressure on the switch or it doesn't open when the pump goes off. If either of these things happens you will have a No Heat or Overheat Situation on most systems. The are other things that will cause a flo code like an inoperative pump or a stopped up filter so be sure the switch is bad before replacing.