A Whirlpool That Runs on the Pool — Fresh Water Three Times a Day.
Normally a whirlpool is a closed system: the same 825 litres are heated, filtered and dosed with chemicals for weeks, until someone drains and refills it. In a holiday rental, with changing guests every week, that is exactly where water quality problems start.
Here the whirlpool is tied into the pool’s filtration. A 25 mm supply is taken from the pressure side, after the pool filter. A programmable valve opens three times a day while the pool pump is running, and filtered, treated pool water flows into the whirlpool. The surplus leaves through a 40 mm overflow and runs back into the pool by gravity.
- Pool filterWater is filtered and treated by the pool’s own system.
- Timer valveOpens three times a day, in sync with the pool pump. A non-return valve prevents backflow.
- WhirlpoolFresh water flows in; the whirlpool heats it and keeps its own filter cycle.
- OverflowThe surplus returns to the pool by gravity — nothing is wasted.
The result: the water is refreshed every day, the level stays constant, and there is one water treatment for pool and whirlpool. Guests simply lift the cover and use it.














