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Introduction to Marine Engineering

Subsubsection Adapters

Adapter fittings are used to connect components that have different threads, diameters or connection methods together, for example: straight to taper thread adapters, pipe to hose adapters,etc..
Figure 5.1.18. Adapters: NPT to straight, NPT to Flare Fitting, NPT to copper pipe
Reducing adapters, as the name suggests, are used to connect pipes of different sizes. A straight reducer has female threads on both ends, while a straight reducing bushing has a large male thread and a smaller female thread. Other reducing adapters including reducing elbow and tees are available with different combinations of male and female threads.
Figure 5.1.19. Straight Reducer and Reducing Bushing