Abstract: A tandem brake master cylinder comprising a longitudinal bore having two pressure chambers therein each associated with a different one of two pressure pistons, each of the two pressure chambers and its associated one of the two pressure pistons are associated with a different one of two brake circuits. Two parallel inlet sockets are provided in the housing of the tandem master cylinder, each of the two inlet sockets connecting a different one of the two pressure chambers to a brake fluid reservoir. A transverse bore is also provided in the housing of the tandem master cylinder containing a pressure control device for one of the two brake circuits, the control device including a stepped piston and a valve controlled by the stepped piston. The transverse bore intersects a plane containing the axes of the two inlet sockets in an approximate perpendicular manner between the two inlet sockets and beween the longitudinal bore and the reservoir.

Abstract: A storm overflow basin for use, e.g. in combined sewage systems has a storage tank leading to a storm overflow unit having a restricted sewage discharge and a storm overflow, the latter being provided with a weir at which there is mounted a flap gate engaging the crest of the weir with its bottom edge and being operable by float controlled means in dependence upon the water level in the storm overflow unit, to move away from the crest of the weir when storm conditions require a controlled overflow discharge. The normal sewage discharge is provided with restriction means that are also float controlled.