The present disclosure relates to a removable orifice plate device which has an orifice plate having a circular portion with an aperture therein, and a graspable end portion extending therefrom. A tee body is included which has oppositely extending first and second tee runs and a tee branch. The tee runs are coupled to gas inflow and outflow pipes. The tee body has internal structure forming a slot which is aligned with an opening formed by the tee branch, and which receives the circular portion of the orifice plate. The orifice plate, when installed in the slot in the tee body, thus allows a flow of fluid only through the aperture. A removable cover encloses the orifice plate within the tee body.
