SEAFLO has a variety of thru-hulls for your specific application. Our Thru-Hulls are meant for installation through the transom and are ideal for overflow use in livewell installations or as an exhaust port for a bilge pump. These thru-hulls are available in a variety of sizes ranging from 5/8″ up to 1-1/2″. Their construction is designed to resist degradation as a result of chemical and saltwater exposure.