Sanitation, Plumbing Design and Installation (Part 7) | Master Plumber Licensure Exam Refresher

No dry or chemical closet toilet can be installed in buildings for human habitation without prior approval from the DHO (Health Officer).

Joints at the roof around pipes need to be made watertight using flashing material.

The minimum wall thickness for threaded plastic pipe is Schedule 80.

Wall-mounted water closets are to be securely bolted to a carrier fitting.

The vertical distance from an inlet to the finished floor line of a typical water closet flush tank is 152 mm.

When installing fuel gas piping, the authority having jurisdiction requires evidence of the installers' competency.

When brazing, the alloys used must have a melting temperature of at least 1000°F.

Drain pipes subject to condensation over food storage or handling areas must be rerouted out of those areas.

Grease traps should be installed to provide access to their cover and allow for servicing and maintaining the trap.

Screws or bolts used for securing floor-mounted fixtures must be made of brass.

Fixtures with concealed slip joint connections require a utility space or access panel.

The overflow pipe from a fixture should be connected on the house or inlet side of the fixture trap.

The diameter of a bathtub's waste and overflow pipe must not be less than 1 1/2 inches.

WIP lead joints must have an exposed surface on each side of a joint of at least 3/4 inches, as measured by the material being joined.

After caulking, the finished joint in caulked joints should not extend more than 3.2 mm below the rim of the hub.

Cleanout plugs and caps in threaded joints must be lubricated with water-insoluble, non-hardening material.

It is good practice to flush a newly opened drain with hot water for at least 5 minutes.

Pipe joint tape is acceptable for use on male threads only if it is a screwed pipe joint.

Joints between lead pipe and cast iron, steel, or wrought iron pipe must be made by means of a caulking ferrule or a soldering nipple.

Gutters in public shower rooms must have a slope of not less than 2% to ensure proper drainage.