4/10 hp submersible sump pump with cast iron housing (8-CBA and 8-CBM have cast bronze housing), polypropylene base, polycarbonate cover, thermal overload protection. “CIA” and “CBA” models have integral diaphragm switch with “on” level at 7" to 10" and “off” level at 1" to 4". 1-1/2" FNPT discharge with a 1-1/4" FNPT adapter.