Ultratech 1073 3/4" bulkhead fitting is a required component when connecting ultratech spill decks together. A bulkhead fitting merges the spill capacity between decks. One bulkhead fitting is needed for every 26" of spill deck length that will be connected. UltraTech Ultra-Spill Deck Bulkhead Fitting, Plus Model, 2-1/2 in Height, 2-1/2 in Length, 1 in Width, Polypropylene, Black.