National Pump Company’s submersible pumps are available in 4-, 6- and 8-inch sizes suitable for commercial, residential and agricultural use.National Pump Submersible Pumps The 4-inch Max Pro, Pro and Max Purity series stainless steel submersibles are recommended for clean water applications. Flows range from 5 to 120 gpm. The 6- and 8-inch NS series are heavy-duty, deep well pumps capable of working in a vertical or horizontal position with flows up to 600 gpm. www.nationalpumpcompany.com