Sierra Bilgeflex bilge pump hose 1-1/8in x 9ft Black — corrugated, chemical-resistant

Sierra International 116-120-1182B is a 1-1/8" x 9' single-layer corrugated Bilgeflex hose designed for bilge pump discharge on boats.

This rugged polyethylene hose combines flexibility and chemical resistance in a compact 9-foot length. Built with corrugations for bending and a stainless-style clamping cuff at every foot, the Bilgeflex line is intended to route pump discharge safely above the waterline. Available in black (suffix B) or white (suffix W), the hose is optimized for marine environments and routine bilge applications.

How does this hose handle tight bends and cramped engine spaces?

The corrugated single-layer construction lets the hose flex around tight bends while maintaining flow for discharge pumps. With a specified 1" (25.4 mm) bend radius, it fits in compact routing paths without kinking when installed correctly.

• 1" bend radius for tight installations
• Corrugated profile supports repeated flexing
• Single-layer polyethylene keeps the hose pliable yet durable

Is the Bilgeflex hose resistant to salt water and common bilge chemicals?

Yes—Sierra's Bilgeflex is made of polyethylene formulated to resist mild chemicals commonly found in bilges and to withstand prolonged exposure to salt water. This resistance helps extend service life when used for pump discharge and routine marine exposure.

• Polyethylene material resists salt water exposure
• Formulated to withstand mild bilge chemicals
• Regular inspection recommended where aggressive fluids are present

How is the hose secured and measured for installs?

The hose includes a clamping cuff at every foot to make secure connections simple and consistent. That integrated cuff spacing helps when trimming lengths, attaching hose clamps, or creating clean fittings for pump outlet connections.

• Clamping cuff located at one-foot intervals for reliable fastening
• 1-1/8" inner diameter matches many standard bilge pump outlets
• Trim to length as needed; use corrosion-resistant clamps

Can I use this hose through a hull fitting below the waterline?

No. This Bilgeflex hose is intended for bilge pump discharge above the waterline and should not be connected to a through-hull fitting below the waterline. Using it below the waterline risks backflow and is outside its designed application.

• Do not attach to below-waterline thru-hull fittings
• Designed for above-waterline bilge pump discharge only
• Follow marine plumbing best practices for check valves and seacocks

Who is this for: Boat owners, shipyard technicians, and marine service professionals who need a reliable, flexible discharge hose for bilge pumps will find Sierra International 116-120-1182B suitable. It's ideal for installations requiring a 1-1/8" ID hose that resists salt water and mild chemicals, fits tight routing with a 1" bend radius, and offers convenient cuffed fastening points every foot. Choose the B suffix for black or W for white to match your vessel's fittings and appearance.