A uniseal is the fastest pipe-to-tank connection there is: a one-piece rubber grommet that seats in a drilled hole and grips a pipe pushed through it, sealing tighter as the pipe flexes. The F114UNISEAL is Ronco's one-and-a-quarter-inch version - sized so rigid pipe of that dimension slides in with soap and effort and stays watertight without threads, flanges, or a wrench.
Where a bulkhead fitting gives you a threaded port, a uniseal gives you a direct pipe entry - the preferred connection on curved tank walls where a flat flange cannot seat, and in tight quarters where there is no room to swing a backing nut. It forgives slight misalignment and absorbs vibration that would eventually work a rigid joint loose, which is exactly the environment inside a boat or RV chassis.
This is Ronco's own accessory, matched to the wall sections of the moldings they have produced in Tustin, California since 1974. The tanks it connects live in our boat tanks and RV water tanks categories; the full line, tanks and hardware together, is on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.