GRABO OTTOVAC and HIGHFLOW, powered suction for rough and porous surfaces

OTTOVAC and HIGHFLOW are GRABO's powered-suction models, built for the surfaces where ordinary vacuum lifters fail. Rough and porous materials leak air continuously, so these units run a higher flow rate to maintain the seal rather than pulling once and holding — which is what makes them viable on concrete, unpolished stone and textured paving. They are the models to look at if your work is predominantly outdoors or in masonry rather than glazing and finished tile, where the standard range is sufficient and lighter to carry.