Page 90 - 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

HEALTH AND SAFETY Pozidriv head
Problems often occur Similar to the Phillips head but has an eight-pointed star shape for
better grip.
and accidents happen
if screwdrivers are Not compatible with Phillips screws.
mistreated or used Hexagon head (Allen key)
improperly. Mainly used in the gas industry for appliance servicing and
● A screwdriver is not a installation.
chisel and should not
be used as such. Star head
● Use the correct Not often used except in specialist installations and appliances. Also
screwdriver for the known as Torx screwdrivers.
screw – for example, a
Pozidriv screw needs
a Pozidriv screwdriver, Each screwdriver has a particular use and, when used correctly, should give long-
not a Phillips lasting service.
screwdriver.
● Never over-tighten Hammers
the screw as this can
damage the screw There are two primary types of hammer used by plumbers. These are described
head, making it in Table 2.2.
difficult to withdraw  Table 2.2 The primary types of hammer used by plumbers
the screw in future.
● Choose the right- Claw hammer
sized blade for slotted Used for driving nails into, and extracting
screws; using too small nails from, wood.
a blade will result The head is made from forged steel and
in the screwdriver the handle is made from wood, fibreglass
slipping out of the or steel.
head, causing damage. The claw splits down the middle, forming
● Keep fingers behind a ‘V’ shape that, when used in conjunction
the blade. with the handle, gives leverage for taking
● Use an insulated out nails.
screwdriver when Club/lump hammer
working with Used for heavy hammering work, mainly
electricity. with cold chisels and bolster chisels.
May also be used in light demolition work.

Chisels

Again, there are two types of chisel a plumber will use (see Table 2.3). Both have
very different uses.
1 Cold chisels are used for breaking and cutting masonry and concrete. These
include:
● bolster chisels
● plugging chisels
● flat chisels.
2 The second type is wood chisels.
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