Denmark-based pump manufacturer Grundfos earlier this year launched an extended range of high-efficiency medium-sized submersible pumps (SPs). The improvements visible in the new four-inch SP pump range stem from the features of Grundfos's range of large SP pumps for professional end-users. The four-inch range has been expanded from two to three sizes, with one more to follow, and is built in corrosion-resistant stainless steel, with three different material grades available, covering liquids from drinking water to seawater.
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