Residential Plumbing Overview for Inspectors

Question 1

An air gap in a drainage system is defined as the __________ through the free atmosphere between an outlet and the rim of a fixture.

Answer 1

unobstructed vertical distance

Question 2

Water supply lines and fittings for every plumbing fixture should be installed in a way that prevents ________.

Answer 2

defective pressure reduction

Question 3

How much space should be in front of a lavatory in relation to a wall, fixture or door?

Answer 3

21 inches

Question 4

Unless the bottom exposed edge of the glass is 60 inches or more above the tub/shower floor surface, an ______________ window at a wall must be of safety glazing.

Answer 4

Exterior

Question 5

A short length of pipe attached directly to a fixture by means of a flange for connection to other piping or traps is called a _________.

Answer 5

tailpieces

Question 6

A shower compartment should have an interior cross-sectional area of at least __________.

Answer 6

900 Sq Inches

Question 7

A _______ is required for most changes in direction of the sewer drainage pipe.

Answer 7

Cleanout

Question 8

T/F: The design of a drainage system is based on uniform flow in the drainage piping.

Answer 8

True

Question 9

What is the temperature of “hot” water?

Answer 9

equal to or greater than 110° F