Plumbing Tools
What this domain tests
The Plumbing Tools domain checks whether you can choose, use, maintain and store hand and power tools safely on a plumbing job. Questions often describe a joint, material or access problem and ask for the correct tool, not the most powerful one.
Core tools and correct use
- A pipe wrench grips round pipe with serrated jaws; pull the handle toward the pipe so the jaws bite. Use it on steel and iron, not chrome-plated copper or plastic.
- An adjustable wrench has smooth jaws for hex nuts and unions. Match jaw size to the nut to avoid rounding.
- A basin wrench reaches supply nuts behind sinks and pedestals; its pivoting jaw turns from below.
- A tube cutter squares small copper and plastic pipe; deburr the inside and outside after cutting.
- A drain auger clears soft blockages in traps and branches; a plunger works on fixture traps, not on a main sewer.
- A pressure test pump, level, tape and chalk line are measuring and testing tools, not lifting tools.
Worked example
A basin supply nut is recessed 40 mm behind a ceramic pedestal. A 250 mm adjustable wrench fouls the ceramic, and a pipe wrench would crush the chrome nut. The basin wrench is correct because its pivoting jaw reaches the nut and allows a quarter-turn from below. The reasoning is access plus jaw type, not pipe diameter.
Traps that cost marks
Do not use a pipe wrench on plastic or chrome; do not use an adjustable wrench as a hammer; do not cut plastic with a hacksaw and leave burrs; do not test a drain with a pressure pump. Store steel tools lightly oiled and power tools with guards and correct bits.