Marine Products International 400-4003 4" x 10' White Vinyl Bilge Vent Blower Hose

The Marine Products International (MPI) 400-4003 is a 4-inch diameter, 10-foot length white vinyl vent hose designed for marine bilge ventilation systems. Part of MPI's 400 Series, this blower ducting hose is built to safely route bilge gases and fumes away from enclosed boat engine compartments.

Key Features:

• 4" Inside Diameter — 4" I.D. (101.6mm) / 4-1/8" O.D. (104.8mm) for compatibility with standard marine blowers and fittings
• 10-Foot Length — Provides ample run length for most bilge blower installations
• Wire-Reinforced PVC Construction — Flexible vinyl hose supported by an anodized wire helix for shape retention and crush resistance
• 3.5 mil wall thickness with .034" wire thickness for durable, long-lasting performance
• UV, Ozone & Weather Resistant — Withstands harsh marine environments and prolonged sun exposure
• Flame-Retardant — Will not support a flame, meeting critical marine safety requirements
• White Color — Standard white finish for the 400 Series

The MPI 400-4003 vent hose is a trusted OEM-style replacement widely used by boat builders and marine technicians. It is compatible with standard 4-inch in-line bilge blowers and connects easily with common marine hose clamps and fittings.