Patriot Fluid End

We offer replacement fluid ends to fit most other brands.
Render of  Patriot Fluid End
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We provide quality replacement fluid ends that fit most makes and models of other brands such as SPM, Gardner Denver, Caterpillar, and Forum as well as our line of durable pump models. Fluid ends we carry are: 

  • Patriot Fluid End
  • WS-600 Pump Fluid End
  • WS-600-SA Pump Fluid End
  • WS-1000 SH Pump Fluid End
  • WS-2500 Pump Fluid End

All our fluid ends are:

  • Forged mono-block
  • Valve-over-valve design
  • Designed to maximize durability and facilitate ease of maintenance to lower total cost of ownership

Note: NOV’s WS-2500 fluid ends are exclusively manufactured in the USA from domestically sourced carbon alloy or stainless steel and feature proprietary autofrettage processing to maximize strength and resistance to fatigue cracking. 

Patriot fluid ends are currently available in Triplex and Quintuplex as well as 4-, 4.5-, and 5-in. configurations.  


  • 40% stress reduction in bore intersection through improved geometry
  • Exhibits peak stresses within 5% of a Y-block fluid end, realizing a low stress advantage without higher maintenance requirements
  • Two-piece valve retainer allows easier assembly and gives line-of-sight confirmation for proper alignment not present with other grooveless fluid ends
  • 26% increase in flow area around suction and discharge valves, reducing cavitation and fluid-end wash outs
  • New geometry optimized to enhance the autofrettage process (validated using strain gauges)
  • Discharge flange allows full access for impact and torque wrenches, allowing accurate meeting of recommended torque specifications
  • Wing-style gauge connection retainer ensures safer installation by eliminating cheater bar 
  • Plug and play interchangeability with most major manufacturers’ power ends
  • Patriot Fluid End-Flyer
Technician building a Patriot Fluid End
Patriot Fluid End render arial view
Patriot End render front view
Patriot Fluid End

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