How do I size a bilge pump?

Bilge pumps are rated in gallons per hour (GPH), but actual output is lower once you account for hose length and vertical lift. Choose a pump rated well above your expected worst-case water intrusion, and consider a second, higher-capacity pump plus a float switch for automatic operation.

Can I use regular garden hose for my boat’s water system?

No. Marine plumbing uses purpose-built hose rated for the specific system — potable water, sanitation, and raw-water/bilge hoses differ in pressure rating, temperature resistance, and permeation. Using the wrong hose causes odors, leaks, or contamination.

Why is ventilation important on a boat?

Ventilation clears moisture that causes mildew and rot, and — critically on gasoline boats — clears fuel vapors from the engine compartment before starting. Blowers, cowl vents, and dorade boxes keep air moving through cabin and engine spaces for safety and comfort.

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Trident Marine

Trident Marine 3" x 50' Blue Polyduct Blower Hose

Manufacturer: Trident MarinePart #: 481-3000SKU: 98957

40°

$399.99● In stock

Item #: 98957

Category: Hose

● In stock — ships fast from US warehouses

Ships from US warehouses
Free shipping on orders over $99
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30-day returns
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Description

3" x 50' Blue Polyduct Blower Hose Trident Polyduct is the most flexible, crush proof and rugged blower duct hose for heat, ventilation, and air conditioning* (HVAC). Heavy Duty polypropylene hose, reinforced with a flexible polypropylene rod helix.

Features: Excellent flexibility & compressibility Excellent resistance to crushing, flex fatigue, tearing, and moisture Stomp on it and it returns to shape without damage Shove it thru tight openings and overheads and it delivers full airflow Application: Rugged blower duct hose for heat, ventilation and air conditioning Specifications: Temperature Range: -40°F to +225°F (-40°C to 107°C) (when insulated) Length (feet): 50' Boxed Inner Diameter (inch): 3" *Meets FMVSS 302 flame resistance

Specifications

Brand	Trident Marine
Part Number	481-3000
EverTide SKU	98957
UPC	704917017518
Beam Angle	40°

Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.

Complete your setup

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Returns & warranty

Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.

Trident Marine productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.

Marine Plumbing & Ventilation — frequently asked

How do I size a bilge pump?: Bilge pumps are rated in gallons per hour (GPH), but actual output is lower once you account for hose length and vertical lift. Choose a pump rated well above your expected worst-case water intrusion, and consider a second, higher-capacity pump plus a float switch for automatic operation.
Can I use regular garden hose for my boat’s water system?: No. Marine plumbing uses purpose-built hose rated for the specific system — potable water, sanitation, and raw-water/bilge hoses differ in pressure rating, temperature resistance, and permeation. Using the wrong hose causes odors, leaks, or contamination.
Why is ventilation important on a boat?: Ventilation clears moisture that causes mildew and rot, and — critically on gasoline boats — clears fuel vapors from the engine compartment before starting. Blowers, cowl vents, and dorade boxes keep air moving through cabin and engine spaces for safety and comfort.

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