SHURFLO Blaster II 4238-121-E07 12V Washdown Pump – 3.5 GPM, 45 PSI, Self-Priming for Boat & RV

Overview

Meet the SHURFLO Blaster II 4238-121-E07, a compact 12V washdown pump built for marine and RV use. It delivers about 3.5 GPM at roughly 45 PSI, enabling efficient deck cleaning, fish box rinsing, and washdowns of anchor lines and hardware.

Designed to withstand wet, salt-spray environments, it features a co-molded diaphragm and a sealed switch for added durability. The unit is thermally protected and self-priming up to approximately 6 feet, and it can run dry without immediate damage, offering reliability during flushes and quick cleanups.

Key benefits

• Self-priming up to ~6 ft for flexible mounting and placement
• 3.5 GPM flow with 45 PSI shut-off pressure supports fast, controlled washdowns
• Thermally protected operation to reduce overheating during extended use
• Co-molded diaphragm and sealed switch provide corrosion resistance

Ideal uses

• Boat deck and cockpit cleaning after a salty day on the water
• Rinsing and refreshing fish boxes, bait wells, and anchor chains
• Freshwater and saltwater washdowns for hull and hardware
• RV exterior cleaning and other mobile washdown tasks

Durability and design

The pump is engineered to stay reliable in marine environments. It’s compact, thermally protected, and built to handle intermittent dry running better than many pumps in its class. A sealed switch and corrosion-resistant diaphragm support long-term performance.

What you get and compatibility

Core 12V washdown pump with built-in protections, ready for deck mounting and hose connections. Compatible with standard fittings and hoses used in boat and RV washdown setups.