Does hot tub water evaporate?
Thereof, how much water do hot tubs lose?
Hot tubs don't waste water. The average household loses 10 gallons of water per day due to leaks—that's 3,650 gallons over the course of a year. Standard toilets use 3-5 gallons a flush. Doing laundry can use 20-40 gallons of water per load. In contrast, the typical hot tub holds 400 gallons of water.
Herein, does hot tub water evaporate in summer?
In short, while hot tub water evaporates all year, it does tend to evaporate faster when it's cold outside since the hot tub water is significantly warmer than the ambient air temperature. Humidity also affects the evaporation rate, so the more humid your air, the less evaporation you will see.
Check for a bad seal — While PVC pipes can burst if water freezes in the line over the winter, the most likely culprit of your hot tub's leak is a bad seal. If you've examined the check valve (or valves) and determined it is not the cause of your leak, a corroded pump seal may be to blame.