The Jabsco 900 Macerator (Code 18590) Is Designed To Quickly Empty Black Water Holding Tanks. The Jabsco 18590 Macerator Pump Automatically Primes Up To A Height Of 1.2 Meters And Is Capable Of Emptying Up To 600 Liters In One Go, Making The Entire Discharge Operation Simple And Fast. The Waste Is Finely Ground And Made Capable Of Easily Passing Through The Co mmonly Used Drain Pipes On Board (25 mm). Equipped With A Safety System To Safeguard The Impeller In Case Of Dry Operation, The Jabsco 18590 Is The Recommended Macerator For Those Seeking Maximum Reliability And Durability Oer Time.