Cut Drain Pipes - You will need to cut PVC Pipes that will be used inside the crash box section of the sump for each drain bulkhead. These pipes are not included with the sump. They Should be a minimum of 4" below the water level in the crashbox. Cut slits in the sides of the pipe near the top where it goes into the bulkheads. This will allow air to escape and reduce bubbles getting into the clariseas. A 45 Degree taper on the ends will also help.