Fitting End Caps, Blind Flanges & Plugs

Image provided by Ferris State University


Blind flanges, plugs, and end caps are all fittings used to end or block a run of pipe. They can also be used to force effluent out of perforated holes, as in gray water subsurface irrigation. They are often liquid or gas tight, depending on the needs of the system.

A blind flange is simply a flange without a center hole that, when bolted to a pipe flange, closes the end of a pipe. A plug is a male threaded fitting which seals the end run of a pipe when fitted into a female threaded fitting, or a barbed plastic fitting inserted into a plastic pipe. An end cap is a female threaded fitting and is threaded over the end of a piece of pipe to seal it off. A plastic end cap fits over the end of a piece of pipe and is connected with the appropriated connection for that type of pipe.


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