A drainage system that only allows floor drains, floor receptors, sinks, lavatories, standpipes, washing machines and laundry tubs, with no toilets, is called a

A drainage system that only allows floor drains, floor receptors, sinks, lavatories, standpipes, washing machines and laundry tubs, with no toilets, is called a

• A. Combination waste and vent
• B. Vented system
• C. Two-pipe system
• D. Separate waste system

Answer: (A)

It’s about how drainage systems are classified by how the waste and vent are arranged. A combination waste and vent system uses the same pipe network to carry waste and to provide venting for the fixtures it serves. The described setup includes floor drains, receptors, sinks, lavatories, standpipes, washing machines, and laundry tubs, and even without toilets the waste and vent are still part of one integrated system. That makes it a combination waste and vent system, because the venting is built into the same piping that carries the waste. A vented system is a broader term that could apply to many configurations, not specifically indicating that waste and vent are combined in one network. A two-pipe system implies separate waste and vent runs from each fixture, which isn’t described here. A separate waste system would indicate different drainage schemes or separate waste pipes beyond a single, shared network, which also doesn’t fit this description.

It’s about how drainage systems are classified by how the waste and vent are arranged. A combination waste and vent system uses the same pipe network to carry waste and to provide venting for the fixtures it serves. The described setup includes floor drains, receptors, sinks, lavatories, standpipes, washing machines, and laundry tubs, and even without toilets the waste and vent are still part of one integrated system. That makes it a combination waste and vent system, because the venting is built into the same piping that carries the waste.

A vented system is a broader term that could apply to many configurations, not specifically indicating that waste and vent are combined in one network. A two-pipe system implies separate waste and vent runs from each fixture, which isn’t described here. A separate waste system would indicate different drainage schemes or separate waste pipes beyond a single, shared network, which also doesn’t fit this description.