Abstract: A moisture penetration preventing manifold protects exterior walls from moisture entry into a wall cavity when wires, cables and pipes must penetrate the wall. The manifold is a solid, waterproof material having a tubular sleeve with a plate at one end sealed to the sleeve. The plate is placed on the exterior of a wall with an upper portion of the plate underneath an exterior moisture barrier sheet, and a lower portion of the plate on an exterior of the same moisture barrier sheet to provide a continuous drainage plane on the exterior. A building service element such as a wire, pipe or the like is passed through the sleeve and the sleeve central passageway is filled with a sealant such as expandable foam to prevent moisture from moving through the passageway.