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Interpump WS251 Sub Assembly (Part No: S400-1003), engine-mount design for Honda GX390K1QX, 15 LPM, 250 Bar, with RS500 gearbox, VRT3 unloader valve, and adjustable chemical injector.

Interpump WS251 Sub Assembly

SKU S400-1003
Was £1,163.89 ex VATSave 19%
£942.75 ex VAT
£1,131.30 inc. VAT
Out of stockWe are sorry, this product is currently out of stock. Call 015395 66193 for availability.
Need help choosing? Call 015395 66193 (Mon–Fri 9am–5pm) or email sales@flowjet.co.uk.

Overview

Interpump WS251 Sub Assembly (Part No: S400-1003) – 15 LPM, 250 Bar – Engine-Mount Design


The Interpump WS251 Sub Assembly is a high-performance pump system designed for demanding industrial applications and is well suited for engine mounting. Delivering 15 liters per minute (LPM) at a pressure of 250 Bar, it is powered by a 10.0hp (7.35 kW) engine. This assembly is equipped with the reliable Interpump WS251 pump and paired with the Interpump RS500 gearbox, ensuring durability and efficiency in high-pressure cleaning tasks.

Suitable for use with the Honda GX390K1QX engine, this sub-assembly comes with all the necessary components for smooth operation, including:

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

This setup is suitable for industries such as automotive, manufacturing, and construction, providing powerful and reliable pressure washing performance for heavy-duty tasks.

Key Features:

  • Pump: Interpump WS251
  • Gearbox: Interpump RS500
  • Flow Rate: 15 LPM
  • Pressure: 250 Bar
  • Power: 10.0hp (7.35 kW)
  • Unloader Valve: VRT3 with M22 outlet
  • Chemical Injector: Adjustable for accurate dosing
  • Easy Start Valve: ES1 for hassle-free starts
  • Inlet Filter: 3/4” hose barb inlet to prevent debris from entering the pump

This engine-mount pump assembly is suitable for industrial users requiring high pressure and durability, making it suitable for heavy-duty cleaning tasks.

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

Interpump WS251 sub assembly with RS500 gearbox, VRT3 unloader and ES1 easy start valve, 15 LPM at 250 bar, for the Honda GX390K1QX.

Specifications

Brand
Interpump
Working Pressure
250
Flow Rate
15
Pressure Washer Pump Series
Interpump 47 Series
Shaft
Hollow Shaft 1"
Search by Interpump model
WS251
HP Power Required
7.5KW / 10 Hp
Weight
19.2 kg

Technical information

15 Lpm - 250 Bar

10.0 Hp, 7.35 kW

Interpump WS251 pump

Interpump RS500 gearbox

VRT3 unloader valve - M22 outlet

Adjustable chemical injector

ES1 easy start valve

Inlet filter - 3/4" hose barb inlet

Suitable for Honda GX390K1QX engine

Delivery & returns

  • Free delivery on online orders over £200 + VAT to a UK mainland address.
  • Orders processed by 2pm go out on tracked, insured next-working-day delivery.
  • Orders under £200 + VAT: delivery £11.99 + VAT.
  • Returns: ask us for a returns number first. Unused goods in their original packaging can come back at our discretion, less a restocking fee; faulty or wrong items have no fee.
Full delivery & returns details

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