The Shurflo 4138-111-E65 Aqua King II is a professional-grade 12-volt automatic fresh water pump designed specifically for demanding marine, RV, and boat applications. Featuring a unique over-molded single-piece diaphragm with internal bypass, this pump delivers exceptional reliability and longevity in harsh environments.
Advanced Four-Chamber Design:
The innovative four-chamber diaphragm design ensures smooth, consistent water flow at all demand levels while eliminating rapid cycling. This pump operates at 55 PSI shut-off pressure, providing steady pressure that virtually eliminates the cycling issues common with lower-pressure pumps.
Key Features:
- 3.0 GPM flow rate with 55 PSI maximum pressure
- 12 VDC operation, 6.5 amp draw
- Self-priming up to 6 feet vertical lift
- Dry-run capability without pump damage
- Sealed pressure switch for corrosion resistance
- Electro-coated motor for marine environment protection
- Built-in check valve prevents backflow
- Thermal overload protection
- Ignition protected and CE certified
- Polypropylene construction for durability
- Compact dimensions: 8-1/8" x 5" x 4-1/8"
Installation and Operation:
The pump features 1/2"-14 NPSM threaded inlet and outlet ports and includes swivel straight adapter fittings (1/2"-14 NPT x 1/2" barb, quantity 2). The sealed motor and adjustable pressure switch ensure quiet, reliable operation. Designed for intermittent duty, this automatic demand pump activates when a fixture is opened and shuts off when closed, providing convenient hands-free operation.
Ideal for boats, RVs, and marine vessels requiring reliable freshwater delivery to multiple fixtures with consistent pressure and smooth performance.
