Looking for DAYTON Sump Pump,1/3 HP,1-1/2" NPT,15 ft. (3BB78)?. 1/3 HP Submersible Sump Pump, Diaphragm Switch Type, Cast Iron Base Material. Item #. Jump to: Replacement Parts. 0 Stars. Be the first to write a review. Shipping Weight 33.5 lbs. Country of Origin China Country of Origin is subject to change. Our Product Experts know how hard it can be to find parts for your sump pump. So we've highlighted a few great places to buy sump pump parts.