Question

which of the following drain pipes is typically used below grade? galvanized steel cast iron brass clay copper question 22 a common use for brass as a waste material is vent piping wet piping fittings drain piping waste piping

Explanation:

For the first question, cast - iron pipes are often used below grade due to their durability and resistance to soil conditions. For the second question, brass is commonly used for fittings in plumbing systems.

Answer:

Question 1: cast iron
Question 2: fittings