Shurflo 4158-163-E75 Aqua King II Premium Fresh Water Pump, 5.0 GPM, 24V DC Marine/RV Demand Pump

The Shurflo Aqua King II Premium Fresh Water Pump (4158-163-E75) is a 24-volt DC demand pump built to deliver strong, consistent water pressure on boats and RVs running multiple fixtures at once. It produces up to 5.0 gallons per minute of flow with a 55 PSI shut-off pressure, giving performance closer to a household water system than a typical marine demand pump. The pump uses a 4-chamber diaphragm design that self-primes from a lift of up to 6 feet and can run dry without damage, making it well suited to fresh water tanks that run low or systems with variable suction lines. A built-in mechanical bypass reduces pump cycling at low flow, which cuts down on the rapid on-off chatter common with smaller demand pumps and results in quieter, smoother operation at the tap or shower head.

Construction is aimed at marine and RV duty: the motor is electro-coated and the switch is sealed, with ignition protection and thermal overload protection built in, and stainless steel hardware is used throughout for corrosion resistance. Wetted components are EPDM, polypropylene (PP), and Santoprene, with the pump rated to handle water temperatures up to 130 degrees F. It runs on 24 volts DC and is intended for boat cabin freshwater systems, RV plumbing, general water transfer, and camping shower setups where multiple fixtures may draw water at the same time.

Specifications

• Brand: Shurflo
• Manufacturer Part Number: 4158-163-E75
• Product Name: Aqua King II Premium Fresh Water Pump 5.0
• Voltage: 24 Volts DC
• Maximum Flow Rate: 5.0 Gallons Per Minute
• Shut Off Pressure: 55 PSI
• Self-Priming Lift: Up to 6 feet
• Pump Style: Submersible, 4-chamber diaphragm demand pump
• Maximum Water Temperature: 130 degrees F
• Product Dimensions: 10 inches L x 5 inches W x 4.75 inches H
• Weight: 7.88125 pounds
• Material: EPDM, Polypropylene (PP), Santoprene, Stainless Steel
• Color: Multicoloured
• Motor Protection: Electro-coated motor, sealed switch, ignition protection, thermal overload protection
• UPC: 752324011896
• Specific Uses: General freshwater transfer, marine freshwater pump

Fitment

Universal fresh water pump for boat cabin and RV freshwater plumbing systems; not vessel- or engine-specific.

Frequently Asked Questions

What flow rate and pressure does the Shurflo 4158-163-E75 pump deliver? The 4158-163-E75 delivers up to 5.0 gallons per minute of flow with a 55 PSI shut-off pressure, which keeps water pressure steady even when running multiple fixtures at once.

What voltage does this pump run on? This Shurflo Aqua King II pump is a 24 volt DC pump, designed for 24-volt marine and RV electrical systems.

Can the pump run dry without being damaged? Yes. The 4158-163-E75 uses a 4-chamber diaphragm design that self-primes from up to 6 feet of lift and can run dry without sustaining damage.

Why does the pump have a mechanical bypass? The built-in mechanical bypass on the Aqua King II reduces pump cycling under low flow conditions, which results in smoother, quieter operation instead of rapid on-off chatter at the tap.

What temperature water can this pump handle? The 4158-163-E75 is rated to handle water temperatures up to 130 degrees F.

What materials are used in this pump? The Shurflo Aqua King II pump uses EPDM, polypropylene (PP), and Santoprene for its wetted components, along with stainless steel hardware for corrosion resistance.

How much does this pump weigh? The Shurflo 4158-163-E75 fresh water pump weighs 7.88125 pounds.

What are the dimensions of the pump? This pump measures 10 inches long by 5 inches wide by 4.75 inches high.

Is this pump protected against ignition sources and overheating? Yes, the 4158-163-E75 features an electro-coated motor, a sealed switch, ignition protection, and thermal overload protection, making it suitable for marine environments.

What applications is this pump designed for? The Aqua King II Premium Fresh Water Pump is designed for boat cabin and RV freshwater plumbing systems, and is also suitable for general water transfer and camping shower setups.

Is this a submersible pump? Yes, the 4158-163-E75 is a submersible-style demand pump with a 4-chamber diaphragm design.