It is not recommended to leave a spa pool empty for an extended period of time, especially for 2 months or longer. Doing so could lead to various damages to the pump, heater element, and shell. Here are some reasons why leaving your spa pool empty for too long is not ideal:
Damage to the pump: When the water is drained from the spa pool, it causes the pump to run dry. This can cause damage to the seals, bearings, and impeller of the pump. If these important components of your spa pump become damaged, it could lead to costly repairs to get it back up and running.
Damage to the heater element: Similar to the pump, when the water is drained from your spa, the heater element is also left to run dry. Without water surrounding the heating element, it could become damaged or even burn out. This could lead to the need for a costly replacement of the heater element.
Damage to the shell: Lastly, leaving your spa pool empty can also cause damage to the shell of your spa. When the spa is empty, it can crack or warp due to the lack of water support. This could cause costly repairs and ruin the aesthetic of your spa pool.
Overall, it is best to avoid leaving your spa pool empty for too long. If you must drain your spa, be sure to refill it and properly maintain it to avoid any costly damages.