Page 680 - 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

the European Standard, to ensure in the UK responsible for the Level: when pipework is perfectly
consistency throughout the EU. encouragement, regulation and horizontal.
enforcement of workplace health,
Fire stopped: a barrier is placed Liaise: establish a co-operative
where the pipe passes through a safety and welfare regulations and working relationship.
floor, ceiling or wall to prevent the government legislation. Maintenance: preserving the
spread of fire and smoke. Heat exchanger: a device or vessel working condition of appliances
that allows heat to be transferred
Flashback: where the flame burns and services.
in the torch body, accompanied by a from one water system to another Mandatory: required by law;
high-pitched whistling sound. It will without the two water systems compulsory.
occur when flame speed exceeds being allowed to come into contact
gas flow rate so that the flame with each other. The transfer of Mechanical suction: suction that is
can pass back through the mixing heat between the two systems created by an electrical/mechanical
chamber into the hoses. Most likely takes place via conduction (see pump installed onto a tanker truck.
causes are incorrect gas pressures Chapter 3, Scientific principles). Meter: a display that enables the
giving too low a gas velocity, hose Hertz (Hz): the SI unit of frequency, local company to take readings for
leaks or loose connections. measuring the number of cycles your bill.
per second in alternating current.
Floc: a collection of loosely bound Method statement: the record
particles or materials. These are Immersion heater: an electrical of how management wants the
bound together by the coagulation element that sits in a body of job to be done. Its main purpose
process for easy removal from the water, just like in a kettle. When is to guide site work and it must
water. switched on, the electrical current always be available on-site as a live
causes the electrical element document with an aim to prevent
Foot a ladder: stand with one foot
on the bottom rung, the other to heat up, which in turn heats accidents or dangerous situations
firmly on the ground. up the water. Most immersion from occurring.
heaters elements are rated at 3
Forced draught: the use of a kW but cylinders can have 1, 2, Molecule: the smallest particle of a
purpose-designed fan to create 3 or 4 elements. All immersion specific element or compound that
a positive updraught by forcing heaters must comply with BS EN retains the chemical properties of
the products of combustion up 60335–2–73 and have a resettable that element or compound.
the flue. double thermostat (RDT) as Multi-disciplinary approach:

Fully pumped system: a heating standard. This enables problems using skills from other professions
system that uses pumped with overheating to be recognised or trades to overcome problems
circulation to both heating and hot quickly. outside the normal scope of
water circuits. In situ: in situ, in plumbing your skill set, trade or profession
to reach satisfactory solutions,
Gravity circulation: circulation that terms, simply means pipework or conclusions or outcomes.
occurs because heat rises through appliances that are already in place.
the water. No pump is required. They are already ‘in situation’, Multi-storey: tall building that
hence the term ‘in situ’. requires boosting or pumping of
Grey water: waste water from the water supply pressure given its
baths, showers, washing machines, Legislation: a law or group of height.
dishwashers and sinks. laws that have come into force;
health and safety legislation for Naphtha: a waxy oil deposit that
Hazard: a danger; something that the plumbing industry includes is present in natural gas in its
can cause harm. the Health & Safety at Work unrefined state. It is removed and
Health and Safety Executive Act and the Electricity at Work later reused in other products such
(HSE): the government body Regulations. as cosmetics.

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