Stuart Turner 3.2 bar PS - Manual (Page 6)

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Hose to Pipework
1. Stuart Turner recommend only the use of their 22 mm flexible hoses.
The hoses are fitted with plastic push-in connectors, which must only be connected
with the following:
a) 22 mm diameter copper pipe to BS EN 1057 - R250 (half hard) - Table 3.
b) 22 mm plastic pipe to BS 7291 part 1 and part 2 (Table 1), or part 3 (Table 1) plus
internal support sleeve*.
* The internal bore of the plastic pipe must be supported against collapse with the
pipe manufacturers’ recommended support sleeve (pipe insert).
c) Appropriate plumbing fittings that are compatible and will provide a water tight
connection.
Ensure the pipe is free from all score marks and deformities in the area of the
insertion depth (Fig. 6) and cut the pipe square removing all burrs and sharp
edges to prevent damage to the sealing ‘O’-ring.
2. Prior to inserting pipe into fitting mark the
insertion depth on the wall of the pipe with
a soft pencil at a distance of 35 mm from the
end to be inserted (Fig. 6).
3. Check in the mouth of the fitting that
‘O’-ring, nylon washer and collet are
in position.
Note: When tightening or loosening the
hose nut assembly, the anti-rotation
flats provided on the inlet and outlet
fittings should be used for placement of
a second spanner as shown. This is to
prevent complete assembly rotation.
It may be necessary to partially rotate
the reed switch clamp assembly on the
outlet fitting to avoid damage during
placement of the second spanner.
Fig. 5
Rubber sealing
washer
Port fitting
Flexible hose
G ¾ running
nut assembly
Reed
switch clamp
assembly
Anti-rotation flats
38 mm AF
29 mm AF
Fig. 6
Pencil
mark
22 mm Pipe
Insert depth
35 mm
Fig. 7
Pipe Stop
Washer
Collet
‘O’-Ring