Question

the most common cause of poor pressure and flow at a single fixture is
poor city water pressure
poor performance of a well pump
a clogged aerator
older galvanized steel supply piping in the house
a partially closed main shutoff valve
question 45
what is the most difficult problem to determine in a bathroom?
low water pressure
condition of shower pan under base
water hammer
faulty tub and tile caulking
continuously running toilets

Explanation:

For the first question, a clogged aerator is a common issue specific to a single - fixture that can cause poor pressure and flow. For the second question, the condition of the shower pan under the base is often hidden and difficult to assess without significant disassembly.

Answer:

1. C. a clogged aerator
2. B. condition of shower pan under base