Question

floor drain problems include all of the following except
missing drain
poor location
backing up
no trap
missing backwater valve
question 42
all of the following are common drainage piping problems except
missing or inaccessible cleanouts
pipe sizes that are reduced as you go downstream
clay tile piping buried in the soil
combustible piping used in multi - family buildings
non - standard piping materials

Explanation:

For the first question, a missing backwater valve is more related to basement flooding prevention for the whole - house water system rather than a direct floor - drain problem. Missing drain, poor location, backing up, and no trap are all issues specific to floor drains. For the second question, clay tile piping buried in the soil is a common type of drainage piping and not a problem in itself. Missing or inaccessible cleanouts, reduced pipe sizes downstream, combustible piping in multi - family buildings, and non - standard piping materials are all common drainage piping problems.

Answer:

First question: missing backwater valve
Second question: clay tile piping buried in the soil