National Pump Company now has 304 and 316 stainless steel impellers, available on their NSF-compliant 6-inch to 30-inch vertical turbine and submersible turbine pump bowl assemblies. Stainless steel is deemed an acceptable material substitution under the NSF standard. On projects where compliant pump materials are specified, consideration should be given to offer stainless steel material alternatives. www.nationalpumpcompany.com