Webtrol 4-inch thermoplastic submersible pumps from Weber Industries Inc. feature injection-molded glass-filled Noryl motor bracket and discharge; oversized stainless steel pump shaft; heavy wall stainless steel pump housing; polycarbonate diffuser and plate with molded in stainless steel wear ring at suction point; and Noryl and stainless steel check valve (brass is optional). Weber Industries Inc., Card No. 291