TeckMark Pressure Switch
TeckMark Pressure Switch is used to detect whether there is any water flowing through the heater assembly. In most cases a spa system will work just fine with a stuck pressure or low switch - until there is a need for it. It is normally operate by water pressure on a bellows that pushes up a little rod that presses on the switch activator, must be manually activated which can be a little tricky because the activating button is underneath the micro switch.
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