Plumbing through tank walls is made much easier and less expensive using a Uniseal®. Unlike bulkhead fittings a Uniseals can handle slight irregularities or curvatures without leaking. With a sturdy backing, a Uniseal® can even be plumbed through liner.
Bulkhead fittings often have limited connection options and force the use . . . → Read More: Uniseal®, individual