Gianneschi EXCELSIOR 4-AB Bronze Hand Pump
The Gianneschi EXCELSIOR 4-AB is a heavy-duty bronze hand pump built for anyone who needs a dependable way to move liquid without relying on electricity or an engine. It's a double acting, semi-rotary wing pump, which means every stroke of the handle — pushing and pulling — moves liquid, giving you a smooth and continuous flow rather than the start-stop feel of simpler single-action pumps. With bronze construction throughout the body and internal components, this pump is built to resist corrosion in demanding environments, whether that's fresh water, sea water, or other aggressive liquids that would quickly wear down a lesser pump.
Rated to deliver roughly 45 liters per minute (about 11.8 gallons per minute) at 95 feet of head, or 40 PSI, the EXCELSIOR 4-AB is capable of real work, not just token liquid transfer. Its 1-1/4 inch inlet and outlet ports make it easy to plumb into existing systems, and its performance is verified to the EN ISO 9906 standard, so you know the numbers on the spec sheet reflect what you'll actually get in the field. Because it requires no power source, it's a natural fit as a backup or primary pump anywhere reliability matters more than convenience.
While this pump is a favorite on boats for bilge duty, tank transfer, and emergency dewatering, it's just as capable outside of marine settings. Farms, workshops, industrial facilities, and anywhere manual liquid handling is needed can put this pump to good use. It's a simple, mechanical solution that keeps working when the power doesn't.
Key Features
- Double acting, semi-rotary wing pump design for continuous flow on both strokes
- Solid bronze body and bronze internal wing/piston components for corrosion resistance
- No electricity or engine required, fully manual operation
- Performance rated in accordance with EN ISO 9906
- Compatible with fresh water, sea water, and aggressive liquids
- Compact, close-coupled handle assembly for straightforward installation
Applications
- Bilge pumping and emergency dewatering aboard boats and vessels
- Fuel, water, or liquid tank transfer in marine settings
- Backup manual pump where electrical pumps are impractical
- Agricultural liquid transfer and irrigation support
- Industrial and workshop liquid handling
- General-purpose manual pumping for fresh or sea water applications
Specifications
- Model: EXCELSIOR 4-AB
- Pump type: High head, double acting, semi-rotary wing pump
- Flow rate: Approximately 45 LPM (11.8 GPM) at 95 feet head (40 PSI), based on 60 cycles per minute
- Port size: 1-1/4" inlet x 1-1/4" outlet
- Body material: Bronze
- Internal components: Bronze
- Performance standard: EN ISO 9906
- Operation: Manual, hand-operated
Frequently Asked Questions
Q: Can the Gianneschi EXCELSIOR 4-AB pump both fresh water and sea water?
Yes, the bronze construction throughout the pump body and internal parts makes it suitable for both fresh water and sea water, as well as other clear, aggressive liquids.
Q: Does this pump require electricity or an engine to operate?
No, it's a fully manual, hand-operated pump. It relies on a double acting wing mechanism, so it moves liquid on both the push and pull of the handle without any external power source.
Q: What is the maximum flow rate of the EXCELSIOR 4-AB?
Under standard test conditions of 95 feet of head (40 PSI) and 60 cycles per minute, the pump delivers approximately 45 liters per minute, or about 11.8 gallons per minute.
Q: Is this pump only meant for marine use?
No, while it's popular for bilge and tank transfer duties on boats, the EXCELSIOR 4-AB works equally well in agricultural, industrial, and general workshop settings wherever reliable manual liquid transfer is needed.
Q: What size fittings does the EXCELSIOR 4-AB use?
It has 1-1/4 inch inlet and 1-1/4 inch outlet ports, making it straightforward to connect into most standard hose or pipe systems of that size.
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