Shurflo by Pentair Upper Assembly Replacement for /4248/4258 Series Pro Blaster II Deluxe 4.0/5.0 Washdown Pumps - 94-804-02

The Shurflo by Pentair Upper Assembly Replacement (94-804-02) is a direct replacement component specifically engineered for the 4248/4258 Series Pro Blaster II Deluxe 4.0/Ultimate 5.0 washdown pumps used on marine vessels and deck wash systems. When your existing washdown pump head shows wear, leaks, or loss of performance, this upper assembly restores reliable flow and performance without needing a full pump replacement. 

📌 Designed for Proven Shurflo Performance

This OEM-style upper assembly fits seamlessly with several Pro Blaster II models including:

• Shurflo Pro Blaster II Deluxe 4.0 (4248-153-A09 / E09)

• Shurflo Pro Blaster II Deluxe 4.0 24 V (4248-163-A09 / E09)

• Shurflo Pro Blaster II Ultimate 5.0 (4258-153-A09 / E09)

• Shurflo Pro Blaster II Ultimate 5.0 24 V (4258-163-A09 / E09) 

This makes it an ideal service part for maintaining peak water pressure and efficient washdown operation on fishing boats, deck wash systems, and other marine applications. 

🔧 Reliable and Durable Washdown Pump Replacement

Engineered to meet the same quality standards as the original equipment, this upper assembly renewal part helps restore your washdown pump’s performance and prolong its service life. Installation is straightforward for anyone familiar with Shurflo Pro Blaster II pump systems, simplifying maintenance and minimizing downtime on the water. 

📋 Key Features:

• Direct replacement for Shurflo Pro Blaster II Deluxe 4.0 and Ultimate 5.0 pumps

• Restores pump head performance without full unit replacement

• Compatible with 12 V and 24 V washdown systems

• OEM standard fit and finish

• Model: 94-804-02 

Key Components & Features

• Integrated Pressure Switch: Pre-set to a 60 PSI shut-off. It features a sealed design to protect the electrical contacts from the corrosive marine environment.

• Upper Housing: Constructed from high-strength Polypropylene for chemical and salt resistance.

• Bypass Technology: Includes the internal bypass mechanism that reduces pump cycling for a smoother, quieter flow.

• Easy Installation: Designed for a "drop-in" fit. You simply remove the perimeter screws from the pump head to swap the old assembly for the new one.

  
  

  
  

Whether you’re repairing a worn-out pump or stocking up on essential service parts, this Shurflo upper assembly replacement offers a cost-effective way to keep your washdown system operating reliably.

Installation Tip: The "Don't Over-Tighten" Rule

When installing the new assembly, tighten the housing screws in a star pattern. Over-tightening can crack the plastic housing or pinch the gasket, leading to "cycling" (the pump turning on and off when no water is running).

Manufacturer : Shurflo by Pentair
Manufacturer Part No : 94-804-02
UPC : 752324012145