Sierra Bilgeflex Bilge Hose 1-1/8" x 9' Black — Corrugated Polyethylene, Built-in Clamping Cuffs

Sierra Bilgeflex 1-1/8" x 9' is a single-layer corrugated polyethylene bilge hose designed for safe, flexible bilge pump discharge in marine environments.

This Bilgeflex hose from Sierra is made of corrugated polyethylene in a single layer, engineered for flexibility, corrosion resistance and easy routing in tight engine compartments and keel spaces. It comes with a built-in clamping cuff every foot for secure connections, is available in black (suffix B) or white (suffix W), and should not be connected to a through-hull below the waterline. The hose is commonly used for bilge pump discharge lines where mild chemical and salt water resistance are required.

How does this hose stand up to salt water and boat chemicals?

The Bilgeflex material resists degradation from salt water and many mild chemicals commonly found in boats, which helps extend service life compared with non-marine-grade tubing. It’s not intended for strong solvents or fuels, so avoid exposures outside typical bilge conditions.

• Made from corrugated polyethylene formulated for marine use
• Resistant to mild chemicals and salt water found in bilges
• Single-layer construction reduces risk of delamination
• Not rated for fuel lines or strong solvent exposure

What fittings and installation details should I know?

Every foot of Sierra Bilgeflex includes a molded clamping cuff to make hose clamps easier to position and ensure a tighter seal. The hose ID is 1-1/8" and the supplied length option here is 9 feet; select color suffix (B for black, W for white) when ordering.

• Inner diameter: 1-1/8" for common bilge pump discharge ports
• Clamping cuff placed every foot to secure fittings reliably
• Flexible corrugation allows routing around obstacles and bends
• Do not attach to through-hull fittings located below the waterline

How flexible is it and what are typical routing advantages?

The corrugated single-layer construction yields a small bend radius for tight spaces while remaining resistant to kinking under normal bilge pump flow. This makes it well-suited for routing from pumps to thru-hulls above the waterline, across stringers, or around engine mounts.

• Bend radius approximately 1" (25.4 mm) for compact routing
• Corrugated profile preserves flow while allowing curves
• Lightweight and easy to cut to length with standard tools
• Available in black for discrete installations or white for visibility

What maintenance and service life considerations apply?

Periodic inspection of the hose, clamps and connections keeps bilge discharge reliable. Replace if you find brittleness, deep abrasions, or chemical attack; although marine-grade, prolonged contact with aggressive chemicals will shorten lifespan.

• Inspect clamps at the molded cuffs to ensure tight seals
• Check for abrasion where hose contacts edges or fittings
• Replace if material becomes stiff, cracked, or heavily worn
• Store unused lengths away from UV exposure to limit aging

Who is this for: Sierra Bilgeflex 1-1/8" x 9' is aimed at boat owners, marine technicians and DIY installers who need a flexible, corrosion-resistant discharge line for bilge pumps on powerboats, sailboats and workboats. It’s appropriate when routing pump discharge to above-waterline thru-hulls or deck fittings, when a small bend radius is required and when a single-layer polyethylene hose with periodic clamping cuffs is preferred.