Shurflo Aqua King II Junior Fresh Water Pump, 12V, 2.0 GPM, Replaces 2901

The Shurflo Aqua King II Junior Fresh Water Pump is a 12V DC diaphragm pump built for medium flow demand in marine plumbing systems. Designed to deliver smooth, consistent flow of 2.0 GPM without rapid cycling, it is well suited to boats with a single fixture or light multi-fixture demand such as a galley faucet, head, or shower. The pump uses a unique over-molded, single-piece 4 chamber diaphragm along with a corrosion-resistant motor and an adjustable pressure switch, allowing it to hold steady pressure as demand changes.

Built for reliability aboard a boat, the Aqua King II Junior is thermally protected, ignition protected, and rated to run dry without damage, so an empty tank or temporary loss of water supply will not harm the motor. It is intended for intermittent duty rather than continuous running. The pump ships with two 1/2 inch hose barb fittings for straightforward plumbing hookup and is backed by a three year manufacturer's warranty.

Specifications

• Brand: Shurflo
• Manufacturer Part Number: 4128-110-E04
• Voltage: 12 VDC
• Flow Rate: 2.0 GPM
• Maximum Amperage: 3.5 Amps
• Shut-Off Pressure: 30 PSI
• Dimensions: 8.2 inches x 4.9 inches x 4.1 inches
• Weight: 4.9 pounds
• Material: Plastic
• Fittings Included: Two 1/2 inch hose barb fittings
• Duty Cycle: Intermittent duty
• Diaphragm: 4 chamber diaphragm
• Warranty: 3 year manufacturer's warranty
• UPC: 752324012374

Fitment

Designed for 12V DC marine freshwater plumbing systems.

Replaces (OEM)

• 2901

Frequently Asked Questions

What is the flow rate of the Shurflo Aqua King II Junior pump (4128-110-E04)? The Shurflo Aqua King II Junior, part number 4128-110-E04, delivers a flow rate of 2.0 GPM.

Does part number 4128-110-E04 replace an older Shurflo pump? Yes, the 4128-110-E04 is a replacement for Shurflo p/n 2901.

What voltage does this fresh water pump run on? This pump runs on 12 VDC, making it suitable for standard marine 12V DC freshwater systems.

What are the dimensions of the Aqua King II Junior fresh water pump? The Aqua King II Junior measures 8.2 inches x 4.9 inches x 4.1 inches.

How much current does the Aqua King II Junior draw? Maximum amperage draw for the 4128-110-E04 pump is 3.5 Amps.

What is the shut-off pressure on this pump? The pump has a shut-off pressure of 30 PSI, controlled by its adjustable pressure switch.

What fittings are included with the Shurflo 4128-110-E04? Two 1/2 inch hose barb fittings are included with the Aqua King II Junior pump for connecting to the boat's plumbing.

Can this pump run dry without being damaged? Yes, the Aqua King II Junior is built to run dry without damage, protecting the motor if the water supply is temporarily lost.

Is this pump ignition protected for use on a boat? Yes, the 4128-110-E04 is ignition protected and thermally protected, meeting marine safety requirements for onboard installation.

How much does the Aqua King II Junior fresh water pump weigh? The pump weighs 4.9 pounds.

What is the difference between the Aqua King II Junior and the Aqua King II Premium 4.0 pump? The Aqua King II Junior (4128-110-E04) delivers 2.0 GPM for single or light multi-fixture use, while the Aqua King II Premium 4.0 delivers 4.0 GPM with a built-in mechanical bypass designed for boats with multiple fixtures running at once.

Is the diaphragm on this pump a multi-piece design? No, the 4128-110-E04 uses a unique over-molded, single-piece 4 chamber diaphragm rather than a multi-piece design.