Forespar Marelon Watertight Bulkhead fittings are designed to create a leak-free passageway through watertight bulkheads for plumbing and electrical wires. Available in a wide variety of barb or thread and straight or elbow configurations, they can be adjusted for bulkhead thicknesses up to 1-1/4?. Highly adaptable, they can be assembled to fit almost any space using Marelon adaptors, tailpipes, elbows, valves or standard hoses.