The IBS-4 is used mainly with existing pools when the width of the pool tapers off towards the bottom.
A separate pit for the roller system is not necessary. In combination with a tubular motor, no motor pit is necessary either.
The roller system is mounted directly below the surface of the water.
| Construction: | Mounted directly below the surface of the water |
| Installation: | New or retrofitting |
| Maximum size: | 25 m x 50 m (larger sizes depending on the pool shape). |
| Drive unit in separate motor pit: | Drive unit mounted on the shaft or chain drive |
| Drive unit without motor pit: | Tubular motor (not always possible, dependent on pool width) |
| Cover-slats: | Standard slats 60 mm wide and 14 mm thick |
| Guidelines: | Installation approved only for private pools |