Hydroman Submersible Sludge Sewage Pump with Control Panel Description: Hydroman Submersible waste water sludge pumps are a popular type of submersible water pump used in pump station of wastewater collection system, submersible sludge pump is compact and often less costly to install than other pump types. Being a below grade installation, these submersible sludge pumps do not obstruct sight lines and are virtually silent during operation. Submersible waste water sludge pumps with control panels will be more energy saving, because the control panel can control the submersible slurry sludge pump reduce or increase the capacity based on demands at any one time, which can have a major positive impact on the submersible pump's lifetime cost.