DESC: The CDT33 is a 1/3 HP submersible sump pump that has the capability to pump up to 3450 GPH. It is constructed with a cast iron volute and stainless steel fasteners to promote long life and durability. The switch is a piggyback tether float that allows for automatic operation if necessary. This pump will operate in sump basins that are 14 in. or larger in diameter. Tools and Hardware