recessed fitting

drainage fitting, Durham fitting

A cast-iron, threaded fitting, used on drainage pipes; has a shoulder such as to present a smooth, continuous interior surface.
References in periodicals archive ?
Electrical outlet, female, supersede, bipolar, 2p + t, 15a, for a voltage between 100 and 250vac, with mirror, recessed fitting, with box for x
As a recessed fitting, all versions in this range are invisible when the light fitting is turned off, however, when activated, the luminaire slowly opens to reveal light from within.
The GL-DLC06 is a recessed LED down light for 6" recessed fittings which comes in 15W and 35W versions.