Our 4000 series pump is our original pump. It has a 4" Inlet & Outlet at 180° to each other and features 6" Nitrided Steel Gears & Bushing Caps. There are a number of customizations available for this pump.
The 4000R is an alternative to the 4000 series pump. It also has a 4" Inlet & Outlet but they are at 90° to each other allowing for modified plumbing configurations. Customizations are available for different fluids.