Page 91 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

Chapter 2 Common processes and techniques

 Table 2.3 Types of chisel used for plumbing
HEALTH AND SAFETY
Cold chisels Here are some important
Bolster chisel points to remember about
A bolster chisel is used for cutting masonry, the safe use of chisels.
brick and concrete. ● Eye protection must be
It can also be used when lifting floorboards, worn when using any
e.g. for cutting out the tongue from tongue type of chisel because
and groove floorboards. of the risk of flying
Often called a floorboard chisel. debris.
Plugging chisel ● Always keep the
Mostly used for cutting out and removing the cutting blade sharp
mortar joints in brickwork and masonry. and well ground.
● Watch out for
Flat chisel ‘mushrooming’ on the
A general-purpose tool for cutting, breaking heads of cold chisels.
and cutting brickwork, masonry, stone and This is where the metal
concrete. begins to fold over
Wood chisels and split due to being
There are many different types of wood repeatedly hit with a
chisel, including flat-bladed and bevelled- hammer. Mushrooming
edge chisels. should be removed by
Mainly used by plumbers for notching joists. grinding on a grinding
Care should be taken as the blades can be wheel.
extremely sharp. ● Always wear gloves
when using cold
chisels. They help to
protect the hands from
Spanners cuts and abrasions.
● Always keep fingers
A plumber’s toolbox should contain a variety of spanners. Different types will be away from the cutting
needed depending on the type of work. Types of spanners include those listed in blade, especially when
Table 2.4. using very sharp wood
chisels.
 Table 2.4 Types of spanner used for plumbing
Adjustable spanner
A general-purpose spanner, used for
tightening compression joints, radiator valve
unions, nuts and bolts.
Three pairs of spanners of varying sizes
are the optimum number for a plumber’s
toolbox.
This tool should be kept oiled and clean.

Open-jawed spanner
These are mostly used for boiler and
appliance servicing.
A small set is recommended for the toolbox.

➜

79

9781510416482.indb 79 29/03/19 8:51 PM