Bilge/Livewell Hose

What Is Bilge & Livewell Hose?

Bilge and livewell hose is purpose-built marine plumbing tubing that handles some of the most demanding jobs on a boat. Bilge hose connects a bilge pump to a through-hull discharge fitting, moving unwanted water out of the hull before it becomes a safety issue. Livewell hose circulates fresh or aerated water in and out of onboard fish-holding tanks, keeping your catch alive from the moment it's landed to the moment you reach the dock. While these two applications sound different, they often share the same hose — and the same unforgiving environment.

Why Marine-Grade Hose Matters

Standard hoses simply aren't built for life below the waterline. Marine bilge and livewell hoses must remain flexible, kink-resistant, and collapse-resistant while withstanding constant vibration, saltwater, and exposure to fuel and mild chemicals. Smooth-bore hose construction is especially important for performance: a smooth interior can deliver roughly 30% higher flow compared to corrugated designs, which translates directly to a more efficient bilge pump and a healthier livewell.

Hose sizing is equally critical. Matching the hose's inner diameter (ID) to the pump outlet minimizes friction loss and keeps the system operating at its rated capacity. Common sizes range from 3/4 in. for livewell and bilge pump applications up to 1-1/2 in. or larger for higher-volume discharge runs. For any installation below the waterline, best practice is to use marine-grade stainless clamps and double-clamp the connections at through-hull fittings.

What to Look for When Shopping

• Bore type: Smooth-bore hose maximizes flow; corrugated hose offers greater flexibility in extremely tight routing situations.
• Wall construction: Reinforced walls — whether via vinyl helix, PVC braid, or wire — resist collapse under suction and handle the rigors of a marine environment.
• Material: Marine-grade PVC and rubber compounds are formulated to resist UV rays, saltwater, ozone, and mild fuel/chemical exposure.
• ID sizing: Match the hose ID to your pump outlet and fittings to prevent flow restriction or leaks.
• Bend radius: Consider how tight the routing needs to be; exceeding the minimum bend radius can cause kinking and premature failure.

Top Brands for Bilge & Livewell Hose

Sierra is one of the most recognized names in marine engine and plumbing parts. Sierra's livewell hose features a multipurpose design with a smooth outer cover and vinyl helix, rated for full vacuum and resistant to mild chemicals and saltwater — suitable for livewell intake and discharge, bilge pump runs, drain lines, and sanitation vent applications.

Shields Hose is a go-to for boaters who need a broad selection of bilge and livewell hose configurations. Shields offers both smooth-bore and corrugated options, including their widely used Multiflex and Bilgeflex series, giving installers the right tool for virtually any below-the-waterline routing challenge.

Trident Marine manufactures heavy-duty bilge and livewell hose engineered for long-term performance in tough marine conditions. Their VAC XHD series features clear FDA-grade vinyl with a hard black PVC helix, offering excellent durability, a smooth bore, and an outstanding bend radius — and comes backed by a 3-year warranty.

Flow-Rite brings focused marine plumbing expertise to the bilge and livewell hose category. Their durable, flexible tubing is designed specifically for pumping and circulating water in bilge discharge and livewell systems, making it a practical choice for anglers and boat builders alike.