For the supply and filtering of feed water from the feed water tank to the shell boiler. Optionally, the pump module can be equipped with a motor with frequency converter for the continuous and demand-adjusted control of the water flow. If required, the pump module can be equipped with a pressure boost pump, which will make a low suction head sufficient. The module is pre-assembled for quick installation. Furthermore, the pump module can be used for the supply and filtering of the condensate from the condensate tank to the deaeration plant.