Menu
Skip to main content
phone.svg 015395 66193email.svg sales@flowjet.co.uk
FacebookTwitterBlogYoutube
All Products
Brands
Machine Repair
Size Charts
Offers
Contact Us
Type to search
Type to search

Shop popular:

NEW Nilfisk Hot Pressure WashersPressure WashersMachine Parts by BrandPumps & SparesPopular High Pressure HosesHose ReelsNozzlesPressure Washer TriggersUnloader ValvesInterpump Service Kits

Free UK mainland delivery on orders over £200 excluding VAT

Speak to an Expert: 015395 66193

Finance Available

Rated 4.8 on Google

Pump Gearboxes For EnginesPump Gearboxes For Engines
Reduction Gearbox 3/4" RS99 For Engines
RS99 Interpump Gearbox

Reduction Gearbox 3/4" RS99 For Engines

SKU: RS99
exc. vat
inc. vat
Price
£213.31
£255.97
In Stock
Order by 2 PM for next day delivery
  • Get finance on orders over £1000 Learn More
  • Free UK mainland delivery on orders over £200 excluding VAT
  • Bulk discounts available
  • Stock moves quickly. For large or urgent orders, call 015395 66193 to confirm availability.
  • Need assistance? Call 015395 66193

Overview

Interpump RS99 reduction gearbox for driving pressure washer pumps from engines with an SAE J609 A flange. Its 2.4:1 ratio brings an input speed of 3450 RPM down to 1450 RPM at the pump.

It has a 3/4" (19.05mm) hollow shaft and handles a maximum pump power of 6.5hp (4.77kW).

Specification

Part numberRS99
BrandInterpump
ModelRS99
Engine flangeSAE J609 A
Reduction ratio2.4:1
Input speed3450 RPM
Output speed1450 RPM
Maximum pump power6.5hp (4.77kW)
Shaft3/4" (19.05mm) hollow

Compatibility

Suits Interpump 44, 49, 50, 53, 58, 60, 63 and MF1 series pumps.

For technical advice or help choosing a part, call 015395 66193 or email sales@flowjet.co.uk.

    Related Products

    01 — 00
    Speciality Gearbox Oil SAE 80W/90 GL4 – 1 Litre for Pump Gearboxes

    Speciality Gearbox Oil SAE 80W/90 GL4 – 1 Litre

    SKU: 199-2000
    In Stock
    Was £16.52 ex vat£16.06 inc. vat£13.38 ex vat

    Get 10% Off Your First Order

    Join our trade list for new-stock alerts, clearance deals and expert cleaning tips. View our Privacy Policy. Unsubscribe at any time.

    Flowjet Cleaning Equipment is a family-run

    business dealing in commercial and industrial

    Pressure Washers

    Customer Service
    Contact UsAbout UsOur BrochuresServicing & RepairMachine Collection & Repair ServiceFinance
    Charts and Drawings
    Pressure Washer Nozzle ChartFoam Nozzle Size ChartParts DrawingFAQsDrone Cleaning EquipmentElectric Motor Sizing Guide
    Information
    Delivery & ReturnsTerms & ConditionsPrivacy PolicyCookie Policy
    Address

    Flowjet Cleaning Equipment LTD

    Unit 4, Gatebeck Farm

    Gatebeck, Kendal

    LA8 0HW

    United Kingdom

    015395 66193sales@flowjet.co.uk
    © 2026. Flowjet Cleaning Equipment Ltd. All rights reserved. Company No. 07548943 / VAT No. 946227313Built by Vitara Commerce
    FacebookTwitterBlogYoutube

    PROMO: Get 10% OFF

    Would you like to save 10% on your order today? Enter your email address to receive a discount code!

    By signing up, you agree to receive marketing emails. View our privacy policy and terms of service for more info.