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Interpump WS202 Sub Assembly (Part No: S400-1002), 21 LPM, 200 Bar, 10 HP with RS500 gearbox, VRT3 unloader valve, adjustable chemical injector, ES1 easy start valve, compatible with Honda GX390K1QX engine.

Interpump WS202 Complete With Unloader & Water Filter

SKU: S400-1002

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Interpump WS202 Sub Assembly (Part No: S400-1002) 21 LPM, 200 Bar

The Interpump WS202 Sub Assembly is a high-performance pump package designed for heavy-duty industrial applications. This assembly features the reliable Interpump WS202 pump, paired with the Interpump RS500 gearbox, making it suitable for consistent and efficient operation. Delivering 21 liters per minute (LPM) at 200 Bar, it is powered by a 10.0hp (7.35 kW) motor, providing powerful cleaning capabilities for a wide range of tasks.


This sub-assembly includes essential components for optimal performance:

  • VRT3 Unloader Valve with M22 outlet for pressure control
  • Adjustable Chemical Injector for precise chemical application
  • ES1 Easy Start Valve for smooth, easy starts
  • Inlet Filter with a 3/4" hose barb inlet to ensure clean water supply

This unit is also suitable for use with the Honda GX390K1QX engine, making it a versatile and powerful solution for pressure washing and other industrial tasks.

Key Features:

  • Pump: Interpump WS202
  • Gearbox: Interpump RS500
  • Flow Rate: 21 LPM
  • Pressure: 200 Bar
  • Power: 10.0hp (7.35 kW)
  • Unloader Valve: VRT3 with M22 outlet
  • Chemical Injector: Adjustable for precise application
  • Easy Start Valve: ES1 for smooth starting
  • Inlet Filter: 3/4" hose barb inlet

This sub-assembly is suitable for high-pressure cleaning applications, offering durability, reliability, and high performance.

Service kits

Interpump kits for this pump, taken from the Interpump parts list and quick kit guide. Check the model on your pump plate before ordering.

Piston20 x 50mm
Valve kitKIT1
Oil seal kitKIT2
Water seal kit (3 pistons)KIT69
Complete seal assembly (1 piston)KIT28
Oil seals, 30 x 55 x 7mmKIT3
Nickel plated valve capsKIT5
Piston boltsKIT6
Head rings, 20mmKIT7
Seal retainers, 20mmKIT10
Intermediate rings, 20mmKIT71

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