Suction hose PROFI 3 screwing

- screwing seals immediately after installation without further tightening
- sealing performed by 2 o-rings
- screwing in the place on contact of o-rings should be lubricated
- o-rings must not be installed dry
- profi screwing is advised to used with firepump mouth extension
- screwing can be used even without o-rings in usual way
- female screw can be removed from suction hose and cleaned easily
- screwing meets request od rules of SH ČMS firesport