The 4SR Submersible Borehole Pump from the 4SR/4SA series features an AISI304 stainless steel casing and durable “floating impellers” made from American Noryl material, which is FDA-approved. The pump is designed with high-quality hydraulics and includes an AISI304 motor base built to NEMA standards, along with an integrated AISI304 check valve, outlet, and strainer. This robust construction ensures reliable performance across a variety of applications, making the 4SR/4SA series suitable for domestic, agricultural, industrial, mining, and food and beverage industry uses.d