A spinal implant for implantation in an intervertebral space is provided, such that the implant may provide a back-out prevention feature and may also provide a visual indication of whether the back-out prevention feature is engaged. The method uses pointed fasteners having radially projecting heads and sleeves that are inserted in the passthrough holes. Pairs of a plurality of plunger heads are positioned within the valve body to provide a plurality of modes of operation, the pairs of plunger heads being positioned within the valve body in one of a filtering mode, a backwash mode, and a direct mode in which flow from the pump is directly into the waste-water disposal outlet. Processing of the query is performed within the time series database only on those data nodes that contain relevant data, and partial results are passed to an output layer for formation into a final query result. A pump is also pivotally connected to the sink to lift the pump during replacement and maintenance operations. In a preferred embodiment, this device is powered such that the energy projected to the electrodes is in range of 100 to 200 watts and the flux of energy supplied to the membrane is in the range of 4 to 25 watts per square inch of membrane surface area.