Infiltration may result from

Infiltration may result from

• A. Bad joints
• B. Improper closed circuit television operation
• C. Poor ventilation
• D. Direct downspout and drain connections

Answer: (A)

Infiltration is water from the surrounding ground seeping into the sewer system through cracks, joints, or other openings in the pipes. When joints are bad, cracked, or poorly sealed, groundwater can enter the sewer lines, especially during or after rain when the soil and pipe pressures change. That makes bad joints a classic source of infiltration. The other options don’t describe how groundwater enters the system. Improper closed circuit television operation is about inspecting the pipes, not about water entering them. Poor ventilation affects odors and gas buildup, not the amount of water seeping in. Direct downspout and drain connections to the sewer are typically considered inflow—surface water from roofs or drains entering the sewer system directly—which is different from infiltration.

Infiltration is water from the surrounding ground seeping into the sewer system through cracks, joints, or other openings in the pipes. When joints are bad, cracked, or poorly sealed, groundwater can enter the sewer lines, especially during or after rain when the soil and pipe pressures change. That makes bad joints a classic source of infiltration.

The other options don’t describe how groundwater enters the system. Improper closed circuit television operation is about inspecting the pipes, not about water entering them. Poor ventilation affects odors and gas buildup, not the amount of water seeping in. Direct downspout and drain connections to the sewer are typically considered inflow—surface water from roofs or drains entering the sewer system directly—which is different from infiltration.