Question

what might cause a gurgling sound when draining water out of a sink? sewer blockage no vent pipe copper drain pipe excessive water pressure undersized drain piping question 12 common drainage piping problems include all of the following except leaks rust freezing split /damaged /crimped oversized

Explanation:

For the first question, a sewer blockage can cause air - water interaction leading to gurgling. Lack of a vent pipe disrupts air pressure balance causing gurgling. An undersized drain piping can also cause gurgling due to restricted water flow and air movement. A copper drain pipe is a material type and not a cause of gurgling, and excessive water pressure is not typically associated with gurgling during sink drainage. For the second question, leaks, rust, freezing, and split/damaged/crimped are common drainage piping problems, while an oversized pipe is not a typical problem.

Answer:

First question: sewer blockage, no vent pipe, undersized drain piping
Second question: oversized