Final answer:
Fixtures on the same floor as circuit-vented fixtures must be either common vented or indirectly vented to ensure proper plumbing system functionality.
Step-by-step explanation:
The student asked which type of vent should be used for fixtures located on the same floor as circuit-vented fixtures, that are not themselves circuit-vented. The correct answer is that these fixtures shall be either common vented or indirect vented. This is an important aspect of building plumbing systems, ensuring proper drainage and venting to prevent sewer gases from entering the building and to maintain the water seal in traps.
In the context of plumbing and building code regulations, when fixtures, aside from circuit-vented fixtures, are situated on the same floor as circuit-vented fixtures, they are required to be either common vented or individually vented.
The purpose of venting in plumbing systems is to prevent siphoning of water from traps and to ensure the free flow of air in drainage pipes, which aids in maintaining proper pressure and preventing the formation of vacuums. Common venting involves connecting multiple fixtures to a single vent pipe, while individual venting involves providing a dedicated vent for each fixture.
Therefore, the complete sentence would be:
"Fixtures, other than circuit-vented fixtures, located on the same floor as circuit-vented fixtures shall be either common vented or individually vented."