The fish ascent screw (FAS, mono-tube)

The economical alternative for fish ascent

With the fish ascent screw (FAS) Hydroconnect additionally offers a low cost solution for the creation of fish passage from downstream water to the upstream water.

After a fast, cost-effective installation the fish ascent screw (FAS) runs with no water loss (savings of the official FAH supply).

The system includes the patented technologies for the low-maintenance belt capstan and the luring and guiding current and is driven by a motor drive (ca. 1-2 kW consumption).

Download data sheet  

Benefits of the fish ascent screw

Injury-free fish ascent

Fish and other river life pass without injury and effortlessly from downstream water to the upstream water.

Low Space

The thin hydropower screw requires a minimum amount of construction work, protects the riverbed and is integrated inconspicuously into the landscape.

No water loss

Savings of the official FAH supply

Suitable for fluctuating water levels– No debris jamming possible

After flooding not maintenance-intensive such as slot pass or pool pass

Fast, cost-effective installation

because of simple and robust construction

Low-maintenance & all heads doable

The patented belt capstan replaces grease-lubricated underwater mountings and allowes all heads.

The solution in use

Location Country River Maintainer Predominant fish Flow Drop height
DürndorfAustriaAlmLeberbauer GmbHTrout up to 90cm1200l/s3,7m
NeubruckAustriaJeßnitzHYDROCONNECTTrout (30cm), bullheads1000l/s3,32m
RetzneiAustriaSulmVerbundPike (90cm)400l/s5,5m

Your project

Additional questions? Contact your product account manager Nino Struska. He would be happy to answer your questions and help you during the planning and realisation.

Enquiries und infomaterial

Name (mandatory)


E-mail address (mandatory)

Request info material

Your message or question

Your personal product account manager

Nino Struska
+43(0) 720 720 900-850


In several EU-countries our system is being offerd by our resellers.

our Resellers

Prizes & Awards




logo KWK