Case Study from HydroFLOW France
Swimming pool water saving through fewer backwashes
Swimming pool water saving was needed at an indoor pool in Colmar that backwashed its filters 78 times a year. Each wash sent heated, chlorinated water to drain, so the cost was not just water but the energy and chemicals already spent on it, and operating costs were rising. In October 2014 one HydroFLOW® P160 was fitted upstream of the filtration system, with the pool open. Flocculation improved ahead of the filters and backwash demand fell. The pool saved 2,535 cubic metres of water a year, energy and chemical costs fell with it, and the installation paid for itself in 0.7 years.
The Challenges
- A swimming pool water saving was needed, with high consumption per backwash
- Filters were being washed 78 times a year
- Heated, chlorinated water was lost to drain in every wash
- Operating costs from water and energy use were rising
- The operator needed a clear return on any investment
The Solution
- Unit installed: HydroFLOW® P160
- Installation point: upstream of the filtration system
- Installed: October 2014 with the pool open
- Previous backwash rate: 78 filter washes a year
The P160 went on the pipe ahead of the filters while the pool stayed open. The signal supports better flocculation before filtration, which reduced backwash demand and cut the loss of heated, chlorinated water. The operators tracked backwash frequency week by week, so the swimming pool water saving was built from their own logs rather than an estimate.
