PGDB Certifying Plumber case studies

PGDB Certifying Plumber · Put your knowledge to work in context.

The PGDB Certifying Plumber credential is issued through the Plumbers, Gasfitters and Drainlayers Board in Aotearoa New Zealand. It is the step that lets a tradesperson legally certify their own sanitary plumbing, gasfitting and drainlaying work rather than working under someone else's supervision. The PGDB Certifying Plumber case studies are 5 cases and about 3,326 words.

Existing apartment stack and shallow boundary connection

You are the certifying plumber for a twelve-unit, three-storey walk-up apartment building built in 1974. The body corporate is converting six units to add a second bathroom and a relocated kitchen sink.

737 words, about 4 min 2

Café water supply, shared pressure and high-hazard backflow

You are asked to assess water supply and backflow prevention for a 60-seat café being fitted out in the ground floor of a two-storey 1920s building. The existing 20 mm lead-in comes from the council main.

688 words, about 3 min 3

LPG continuous flow heater and cooktop interaction

You are called to a rural lifestyle property with two 45 kg LPG cylinders and an automatic changeover regulator. The existing installation supplies a four-burner cooktop through 15 mm copper tube that runs 22 m from the regulator, including 6 m buried in concrete without a sleeve.

680 words, about 3 min 4

Low-pitch addition, internal gutter overflow and clay soak pit

You are the certifying plumber for a 40 m² single-storey addition to a 1965 brick veneer house in a high-rainfall coastal town. The addition has a 5° mono-pitch roof draining to a 4.5 m internal gutter with a single 80 mm downpipe at one end.

647 words, about 3 min 5

Certifying a subcontractor's defective sanitary plumbing under pressure

You are the certifying plumber on a $2.8 million childcare centre fit-out. The sanitary plumbing subcontractor has installed 12 hand basins, four toilets, a kitchen sink and a 25 m length of 100 mm PVC building drain at a fall of 1:120.

574 words, about 3 min