Shurflo Aqua King II Premium 4.0 Fresh Water Pump, 12V DC, 4.0 GPM, Replaces 4901

The Shurflo Aqua King II Premium 4.0 Fresh Water Pump is a 12V DC diaphragm pump built for boats with multiple plumbing fixtures, delivering steady, "just like home" water pressure at the galley sink, head, and shower without repeated pressure drops. A built-in mechanical bypass function lets the pump operate smoothly at lower flow conditions with minimal cycling, so it runs quietly and does not short-cycle when a single fixture is opened. The pump uses a co-molded, single-piece diaphragm across 4 chambers, paired with a heavy-duty, seamless shell and an electro-coated motor designed to resist corrosion in the marine environment. O-ring sealed end bells and fully sealed wire entries keep water out of the electrical components for a long service life. This pump is self-priming up to 6 feet and can run dry without damage, making it forgiving during tank changeovers or line work. It is thermally protected and ignition protected, with a sealed pressure switch that is also adjustable to fine-tune the shut-off point. Installation is straightforward: the pump ships with an inlet strainer and two 1/2 inch hose barb fittings, and it is CE and IMCI Certified (8846) with a 3 year manufacturer's warranty. It is designed for 12V DC marine and RV freshwater plumbing systems and is a direct replacement for pump p/n 4901.

Specifications

• Brand: Shurflo
• Manufacturer Part Number: 4148-153-E75
• Voltage: 12 VDC
• Flow Rate: 4.0 GPM
• Dimensions: 10 inches x 5 inches x 4.75 inches
• Amps (Max): 10 amps
• Shut-Off Pressure: 55 PSI
• Fuse: 15 amp
• Fitting Size: 1/2 inch hose barb
• Weight: 7.95 pounds
• Material: EPDM, Polypropylene (PP), Santoprene, Stainless Steel
• Certifications: CE, IMCI Certified (8846)
• Warranty: 3 Year Manufacturer's Warranty
• UPC: 752324011858

Fitment

Designed for 12V DC marine and RV freshwater plumbing systems, particularly boats and cabins with multiple fixtures running off the same pump.

Replaces (OEM)

• 4901

Frequently Asked Questions

What flow rate does the Shurflo 4148-153-E75 pump deliver? The Shurflo Aqua King II Premium 4.0 Fresh Water Pump delivers 4.0 GPM with a 55 PSI shut-off pressure, enough to supply multiple fixtures running at once.

Is this pump a direct replacement for pump p/n 4901? Yes, the Shurflo 4148-153-E75 is listed as a direct replacement for pump p/n 4901.

Can the Aqua King II Premium 4.0 run dry without being damaged? Yes, this pump can run dry without damage and is also self-priming up to 6 feet, so it recovers on its own after a tank runs low.

What size fittings come with the 4148-153-E75 pump? It includes an inlet strainer and two 1/2 inch hose barb fittings for connecting to your plumbing lines.

What are the dimensions of this Shurflo water pump? The Shurflo Aqua King II Premium 4.0 measures 10 inches x 5 inches x 4.75 inches.

How much does the Aqua King II Premium 4.0 pump weigh? This pump weighs 7.95 pounds.

What voltage and amperage does this pump require? The 4148-153-E75 runs on 12 VDC and draws up to 10 amps maximum, with a 15 amp fuse rating.

Why is this pump quieter than a standard water pump? A built-in mechanical bypass function allows the Aqua King II Premium to operate smoothly at lower flow conditions with minimal cycling, which reduces the pulsing and noise common in simpler demand pumps.

What is the pump body made of? The Shurflo Aqua King II Premium 4.0 uses EPDM, Polypropylene (PP), Santoprene, and Stainless Steel in its construction, with a heavy-duty seamless shell and an electro-coated motor for corrosion resistance.

Is this pump certified for marine use? Yes, the 4148-153-E75 is CE and IMCI Certified (8846) and is ignition protected and thermally protected for marine installations.

What is included in the box with this pump? The Shurflo Aqua King II Premium 4.0 ships with the pump unit, an inlet strainer, and two 1/2 inch hose barb fittings.

What is the warranty on the Aqua King II Premium 4.0? This pump carries a 3 year manufacturer's warranty.