Spa Gas Controller w/double airwitch & timeclock with solenoid Flow Control Valve

Spa gas controller with dual airswitches and timeclock to suit air blower and spa pump - timeclock on pump output for automating filtration/heating cycles Thermostat dial for setting heat. The thermost effectively controls power to the solenoid valve which allows/blocks water flow to a gas heater thereby controlling spa water temperature. Thermostat sensor with taper threaded brass sensor pocket included - install sensor in pipework from spa going to pump for heater bypass return line. Suits gas heaters with pilot light systems utilizing an in-line 24v solenoid to control water flow to heater rather than electronic ignition requiring a power outlet. Suits Bosch, Everdure and others with pilot light and no electrical connection.