Page 682 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

The City & Guilds Textbook: Plumbing Book 1

Spigot: another name for the plain Throating: a slight indentation that It can also be caused by a faulty
end of a pipe. If the fitting we buy the bending machine makes when washer or diaphragm.
has a plain pipe end, we call this a the bend is formed. Wavering out: the process of water
spigot end.
Toolbox talk: a toolbox talk is an in traps in appliances moving
Stratification: in a hot water informal meeting to deal with with a wave-like motion because
storage cylinder, water forms in matters of health and safety in of pressure fluctuations due to
layers of temperature from the top the workplace and safe working exposure to winds.
of the cylinder where the water is practices. They are normally Wetting: the process of using a
at its hottest, to the base where short meetings conducted on-site flux and solder to join copper
it is at its coolest. Stratification before the commencement of components is often referred to in
is necessary if the cylinder is the day’s work activities. Toolbox the plumbing trade as wetting.
to perform to its maximum talks are an effective way of
efficiency and manufacturers will refreshing operatives’ knowledge Wheel and axle: a mechanical
purposely design storage vessels and communicating the company’s device used to wind up weight;
and cylinders with stratification health and safety culture. includes a grooved wheel, turned
in mind. Designers will generally by a cord/chain, and a rigid axle.
design: Turbidity: the cloudiness or Work programme: a very detailed
haziness of water caused by
l a vessel that is cylindrical in particles that are usually invisible document used on projects to record
shape to the naked eye. Turbidity is a key and assess activity against expected
l a vessel that is designed to be test of water quality. time to complete the project. For
installed upright rather than example, it might highlight that
horizontal Units of power: these are read as poor quality of work and low safety
l a vessel with the cold kWh (kilowatts per hour). standards could apply to someone
feed entering the cylinder Velocity: the measurement of the completing work ahead of schedule.
horizontally. rate at which an object changes It could also demonstrate that very
Temper: the temper of a metal its position. In order to measure it, slow progress on a job would impact
on labour costs. The competence of
refers to how hard or soft it is. we need to know both the speed the plumber is very important and
of the object and the direction in
Tender: to submit a price or which it is travelling. It is measured their performance must be assessed
quotation for a job or contract. carefully.
in metres per second (m/s).
Terminal: the terminal of a flue Water hammer: caused by a rapid Zinc chloride: a corrosive
system is the last section of the flue opening and closing of the float- substance that can cause skin
before the flue gases evacuate to operated valve. As the water nears irritation, burns and eye damage if
the atmosphere. Different boilers the water level in the cistern, the it gets in the eye.
and fuels require different terminals.
ball valve can begin to bounce Zoning: a process where living spaces
Terminal: the entry of the cable to a quickly up and down and from side and sleeping spaces are individually
fixed position where it is known to to side. This causes the noise to controlled via independent time
terminate/fix. travel down the pipework, resulting clocks, room thermostats and
in reverberation or a whining noise. motorised zone valves.
Throat: the inside face.

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