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

Shower Room Gutter Slope00:00:23

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

Approval for Dry/Chemical Closets00:00:40

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

Watertight Roof Joints00:01:03

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

Threaded Plastic Pipe Wall Thickness00:01:22

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

Wall-Mounted Water Closet Installation00:01:40

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

Water Closet Flush Tank Inlet Height00:01:57

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

Competency for Fuel Gas Piping00:02:16

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

Brazing Alloy Melting Temperature00:02:36

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

Drain Pipes Above Food Areas00:02:55

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

Grease Trap Access and Maintenance00:03:15

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

Floor-Mounted Fixture Screws/Bolts00:03:35

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

Concealed Slip Joint Connections00:03:53

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

Overflow Pipe Connection00:04:12

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

Bathtub Waste and Overflow Diameter00:04:35

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

Lead Joint Exposed Surface00:04:53

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.

Caulked Joint Extension Below Hub00:05:14

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

Threaded Joint Lubrication00:05:34

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

Flushing Newly Opened Drains00:05:54

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

Pipe Joint Tape for Male Threads00:06:13

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

Lead Pipe to Cast Iron/Steel/Wrought Iron Joints00:06:32

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.