Question

1. what is wrong with this drain installation?

image of drain pipes

• there is not enough slope on the horizontal section
• the drain is double-trapped
• the first trap is higher than the second trap
• the tailpiece on the second trap is too long
• the vent pipe is not visible

1. what would you report here?

image of sink pipes

Explanation:

Question 3

In drain installation, a double - trap occurs when there are two P - traps in a single drain line. Looking at the drain setup, having two traps (double - trapping) is incorrect as it can cause issues with proper drainage and sewer gas release. The other options: not enough slope on horizontal section is less likely here, first trap higher than second isn't the main issue, tailpiece length and vent pipe visibility aren't the key problem here.

Answer:

B. The drain is double - trapped

Question 4

Since the image for question 4 is not fully described (only the sinks and some pipes are mentioned but no details about the problem like leaks, incorrect pipe connections, etc.), we can't provide a definite answer. If we assume common sink - related issues (like leaky pipes, improper connections, etc.), but without the image details, we need more information. For now, if we consider a common scenario like a leak under the sink or improper pipe installation, but we need the image details to be precise.