Chiltern Model Steam Engine Boilers are complete with all the fittings needed to power our own and other model steam engines. The Live Steam boiler just needs to be connected to the engine and supplied with a Propane/Butane gas supply (optional gas and steam pipes are available).

The horizontal 4 inch Model Steam Engine Boiler has been professionally manufactured to the highest standards. The manufacturer is a leading provider of model steam boilers in the United Kingdom.

The model live steam engine boiler is a centre flue boiler with 2 high output mesh gas burners connected together to form one gas connection. It has a large centre flue with cross tubes arranged to maximise surface area heating. It can be used generally to power single and twin cylinder engines and also for marine applications/boats. Mounting is using 2 M3 screws into lungs on the bottom of the boiler and a short U steel  section.

The price includes the boiler fittings (safety valve, water level gauge, pressure gauge and steam outlet valve) and gas burner/Injector.

All boilers are fully assembled, tested by the manufacturer and come with a Boiler Test Certificate and instructions.

Optional extras include gas canister regulator and pipe, and ready made copper steam pipe (with connector for specific engine).


  • Boiler diameter 4"
  • Boiler length 8 1/2"
  • Height overall 9"
  • Outlet valve 1/4" x 40tpi
  • 3 additional outlet valve bushes on the dome 1/4" x 40tpi
  • Boiler fill clack valve bush 1/4" x 40tpi
  • All 4 bushes replicated on each end of the boiler
  • Gas pipe connector 1/4" x 40tpi
  • Working pressure 60psi max
  • Test pressure 120psi
  • Removable chimney

NOTE: The model steam engines and boilers are NOT children’s toys and should not be assembled or operated by children unless under close supervision of an adult.

4 inch Horizontal Boiler Complete

  • Product Code: WH4B
  • Availability: Out Of Stock
  • £595.00

Available Options

Tags: 4 inch Horizontal Boiler Complete