Self-Test D-4.1 Drainage System Testing Code Requirements

Complete Self-Test D-4.1 and check your answers.

1. For what period of time shall a drainage or venting system hold a water test before it is passed by the inspector?
   1. 15 min
   2. 20 min
   3. 25 min
   4. 30 min

    

2. What pressure shall drainage or venting systems hold during an air test?
   1. 15 kPa (2 psig)
   2. 21 kPa (3 psig)
   3. 35 kPa (5 psig)
   4. 56 kPa (8 psig)

    

3. During a ball test, what size ball shall a 3 in. drain be able to pass before the inspector accepts the installation?
   1. 75 mm
   2. 50 mm
   3. 38 mm
   4. 62 mm

    

4. The final test of a plumbing system is performed after all of the fixtures are installed and put into operation.
   1. True
   2. False

    

5. When testing drainage and venting installation for leaks with water (water pressure test), the pipe must be fitted with a standpipe for the introduction and observation of test water. What is the minimum height requirement for such a standpipe?
   1. 1.5 m
   2. 2 m
   3. 3 m
   4. 4 m

    

6. In certain instances, a code official may require a final test on the DWV system. The substance used will be either smoke or 25 mm air pressure.
   1. True
   2. False

    

Answer Key: Self-Test D-4.1 is on the next page.