Here is a picture of my sump.
The tank is an Oceanic 135 with dual overflows and the sump is a regular 75 gallon tank that was drilled.
On the left side of the tank in the back you will notice the Eheim pump. It has a pre-filter and a hose connects it to the PVC
fitting in the center. From there you will see the red ball valve where the water flows up to the T fitting. From there it goes up through the overflow boxes into the tank with flexible Oceanic pipes. On the right side of the tank the water flows back down into the sump.
Also on the right side I built a high volume pump in the system(Little Giant4-MDQX-SC). When I do a water change I turn this pump on and the circulation blows all of the stuff off of the bottom, without uprooting the plants. I simply move the Oceanic pipes in the tank to wherever I want to blow stuff off of the bottom. Through valving I can pump the water through the water hose connection on the outside of the tank on the right, or just use my magnum to get rid of the extra water. This system really works well and I don't have to use a Python or such.
The system really works well and it is almost maintenance free, meaning I don't have to get my hands in the water.
This is a picture with the back cover on. I eventually moved the Magnum on the inside of the sump area so everything is inside except for the Magnum hoses and the water outlet.