Boat freshwater pumps supply clean water for sinks, showers, and appliances on board. Marine pumps handle seawater for ballast, bilge, or cooling systems. Both are essential for maintaining water flow and safety in marine environments.

Size: Typically ranges from 1/2 inch to 2 inches in diameter for freshwater and marine pumps.

Grade: Marine-grade pumps are designed to meet ISO, ABYC, or USCG standards for durability and safety.

Viscosity: Suitable for low to medium viscosity fluids (1-100 cSt), depending on pump type (diaphragm, centrifugal, etc.).

Buoyancy: Not applicable for most pumps, as they are fixed installations; portable pumps may have buoyant housings.

Material: Stainless steel, bronze, or reinforced plastics for corrosion resistance in saltwater environments.

Flow Rate: Varies from 5 GPM (gallons per minute) to 50 GPM, depending on pump size and motor power.

Pressure Rating: Typically 10-100 PSI, with higher pressures for specialized applications.

Power Source: 12V/24V DC or 110V/220V AC, depending on marine or freshwater use.

Temperature Range: -10°C to 80°C (14°F to 176°F) for standard models.

Seal Type: Mechanical or lip seals, often viton or nitrile for chemical and saltwater resistance.