Replacing a worn-out hot tub cover ... a consistent water temperature. A sagging cover may also be at risk of complete collapse, further emphasizing the need for a replacement." ...

Once a hot tub is filled with water, electrical resistance heaters warm the water to between 100 and 104 degrees. A pump forces water through an intake hose to circulate. A valve diverter then ...

Raspberry Pi web enabled hot tub controller, supporting a heater (on/off or pool/spa control), air and water temperature thermistors, one two-speed pump, a second pump ... I decided to try this again, ...