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Marine Pump Sizing Guide: Bilge, Washdown, and Freshwater
How to choose pump flow and pressure for common onboard systems.
Flow vs Pressure
Bilge systems prioritize flow rate, while washdown and freshwater systems require pressure consistency.
Installation Realities
Hose diameter, lift height, and power supply all influence real on-boat performance.
Frequently Asked Questions
Can one pump do everything?
No. Bilge, washdown, and freshwater systems have different performance targets and duty cycles.