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Official Stockist

Diagram & User Manual Search

Quickly locate your appliance and order replacement parts using our secure online payment facility.

  • Over 20,000 appliances available
  • Simply click on the part to buy
  • Secure online payment
  • Next day delivery

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Created by Gas Engineers, for Gas Engineers • We only sell Genuine Boiler Spares • HSP - Where The Trade Buy

Boiler Diagrams & Schematics

Quickly identify the part you need using our extensive spares and schematic database

Installation service instructions & user manuals

Whether you’re looking for an installation or service manual, or some simple guidance on how to use your appliance, we hope you’ll find what you’re looking for in our Diagrams & Manuals section. If you can’t find what you’re looking for, please contact us 


Why choose HSP

HSP provides boiler spare parts identification information for thousands of heating appliances. Our database is constantly growing, and no other source of information is as accurate or as complete - plus it's FREE.

To get started, just search for the boiler you need either by name or gas code using the form above.

What's Included?

  • Access to 24,000 diagrams FREE
  • Need help finding the right parts? Use our, industry-leading parts identification tool.
  • Viewable on your laptop, smartphone or tablet wherever you are
  • All diagrams are "explodable" meaning you can pinpoint that hard-to-find part quickly
  • Order securely via our online spares ordering system
  • Only genuine parts supplied - not cheap copies that might fail prematurely
  • Use our Gas Safety software - create, store and send Gas Safety Certificates online


Once you have identified your spare part you can order quickly and securely online - no need to travel miles to your local merchant. You'll even get your part delivered the next day!

Need help?

If you need help with this service, please call Customer Support : 0333-006-3675  

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