MI Plumber case studies

MI Plumber · Put your knowledge to work in context.

A Michigan plumber license is a state-issued credential that authorizes a person to perform plumbing work for compensation in Michigan. The licensing program is administered by the Michigan Department of Licensing and Regulatory Affairs (LARA), and the examinations are the assessment step that separates an apprentice or a candidate with qualifying experience from a licensed journeyman or master plumber. The MI Plumber case studies are 5 cases and about 4,600 words.

Relocating a Water Closet onto an Old 4-Inch Building Drain

A contractor is remodeling the lower level of a 1955 split-level in Grand Rapids and must relocate the water closet about 6 feet. The new 3-inch branch will run 6 feet to the existing 4-inch cast-iron building drain, which runs 40 feet to the city sewer at 1/8 inch per foot.

799 words, about 4 min 2

Venting a New Bathroom Over a Garage Through the Attic

A plumber is adding a bathroom over a garage in a two-story house in Traverse City. The lavatory has a 1-1/4-inch trap and a 5-foot trap arm; the shower has a 2-inch trap and a 9-foot trap arm.

895 words, about 4 min 3

92 psi at the Meter and a Third-Floor Shower

At a new three-story house in Ann Arbor the static water pressure measured at the meter outlet is 92 psi. The meter is a 5/8-inch meter, and the longest developed length from the meter to the third-floor shower is 130 feet of 3/4-inch copper.

867 words, about 4 min 4

Drum Trap, Over-Pitched Trap Arm, and a Gurgling Kitchen Sink

A 1925 house near Kalamazoo has a second-floor lavatory whose 1-1/2-inch trap is a brass drum trap installed in the ceiling cavity below, with a soldered cover that has been painted over. The trap arm from the fixture to the stack is 5 feet long and drops about 9 inches, and the fixture has no vent.

975 words, about 5 min 5

Sizing a 1/2 psi Gas Line and Getting Combustion Air to a Mechanical Room

A plumber is piping natural gas at 1/2 psi (about 7 inches water column) in a small commercial building in Flint. A 3/4-inch Schedule 40 black iron line runs from the meter to a manifold; the longest measured run is 60 feet, and with fittings the equivalent length totals 80 feet.

1,064 words, about 5 min