Locating the Building Sewer and Building Drain

Front

What is the purpose of a 'sleeve' in piping?

Back

To prevent pipes from being damaged by contact with concrete

Front

In plumbing, the lowest point or the lowest inside surface of a channel, conduit, drain, pipe, or sewer pipe is known as the ________.

Back

Invert elevation

Front

What is the purpose of using rebar in plumbing installations?

Back

To provide protection against movement

Front

Fill in the blank: When verifying the layout for below-grade piping, you must locate all underground site utility lines. Use grade lines attached to _______ to establish the locations of the drains.

Back

batter boards

Front

What is the total length of the building drain shown in the house floor plan?

Back

16'-9"

Front

Fill in the blank: The minimum depth required for the sewer tap from the finished floor of the basement is ___ inches.

Back

41

Front

What is the importance of maintaining the proper grade in a plumbing system?

Back

It prevents blockages and ensures proper flow.

Front

Fill in the blank: According to the velocity table, a 4-inch pipe with a fall of 1/4 inch per foot has an approximate velocity of ____ ft/sec.

Back

2.03

Front

What is the purpose of a benchmark in construction?

Back

To serve as a reference point for elevation.

Front

Fill in the blank: Grade is expressed as vertical fall in fractions of an inch per foot of horizontal run. For example, a grade of ¼ inch means that the line of pipe will fall ¼ inch for every foot of run. The fall is the total change in ______ for the length of pipe.

Back

elevation