Page 114 - 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

To complete a press-fit joint for sizes up to 35 mm, follow these steps:
INDUSTRY TIP

Press-fit fittings require a
special electrical press tool,
which crimps the fitting onto
the tube to make a secure
joint. They are packaged in
separate, sealed plastic bags.
They should be kept in them
to prevent the lubricant from
drying out. STEP 1 Cut the tube with, preferably, a tube cutter STEP 2 The tube must be fully inserted into the
and de-burr the pipe. Care should be taken to ensure socket. To ensure this, use a socket depth gauge
the tube is cut square. to mark the depth of the socket onto the tube or,
alternatively, measure and mark using a rule.

STEP 3 Insert the tube into the fitting all the way STEP 4 Place the jaws of the press-fit tool over the
to the tube stop. The fitting depth mark previously bead of the fitting, making sure the jaws of the tool
made on the tube will help as a guide. are well lubricated.

STEP 5 A 90° angle between the tool and the socket STEP 6 Press the trigger on the press-fit tool to start
must be maintained when making the joints. the jointing process, making sure that fingers are
kept away from the jaws.
p Figure 2.26 Completing a press-fit joint

Fittings recognition

Fittings recognition is a part of a plumber’s job. Choosing the right fitting for
the right application is a key element of a successful installation. There are four
fittings that are used more than all others. These are couplings, equal tees,
elbows and reducers. Table 2.17 shows these four fittings in each of the jointing
types.

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