a compact hydraulic unit for slip - controlled brake systems with several hydraulically , mechanically and / or electrically operable functional elements arranged in an accommodating member , with several pressure fluid channels connecting the functional elements . the pressure fluid channels create a hydraulically operable connection between at least one pressure fluid supply and one pressure fluid consumer . a control device can be connected with the valve and the driving elements by means of electrical conductors . the valve elements are arranged in several valve accommodating bores of the valve accommodating member in a first and a second row . pressure fluid bores are provided between the two diametrically extending valve rows which connect the valve elements and location bores containing the pressure generating element and the driving element . outside the two valve rows , there are further location bores in the valve accommodating member in which pressure accumulator pistons are positioned .