This improved version has a lot of the assembly and plumbing done for you. All Parts have been blocked into components, making them easier to move and place before exploding and extruding to your pool model. All components are fully painted. The filter multiport valve has been updated to the newer version of the pentair top mount valve. The filter, heater and pump have the unions added to them that come with the products. Easily drag and drop whole filter pads as one unit into your drawing.