Installation Guide

19
Pipe support and clipping
There are two types of pipe clip in the Speedfit range.
Firstly, a nail clip is used for
fixing to timber when
running concealed pipe
work i.e. underfloor or in a
roof space. This clip takes
less time to fit and is
compact which allows
pipework to be fixed close
together when space
is at a premium.
The second type uses a
screw and therefore takes
a little longer to fix. When
pipes are required to cross
over, it is possible to add a
spacer to the clip. This will
give room between the
pipe and the wall to allow
the pipes to cross over.
If pipework needs to be
insulated, using the spacer
will give room for the
lagging to be applied.
Pipe clips should not be fitted any closer than 60mm
from the end of the fitting to allow for expansion.
Pipes should always be adequately supported to
prevent undue stress or side load on the fittings.
Recommended clip spacing
For surface mounted pipes.
Pipe
diameter
Clip spacing
Horizontal run Vertical run
10-15mm 300mm 500mm
22mm 500mm 800mm
28mm 800mm 1,000mm
Pipe sizing
For general guidance on pipework sizing, please refer to
BS EN 806 and complimentary guidance form BS 8558,
and BS EN 12828 or the Institute of Plumbing Engineering
Services Design Guide. Speedfit Fittings are suitable for
connection to pipe sizes within ± 0.1mm of nominal size.
The maximum heat carrying capacity and flow of
Speedfit pipe, based on 1.2m/s velocity and an 11°C
temperature drop is shown in the table below.
Pipe
size
Max capacity
kW
Max flow
litres/sec
Headloss
m/m pipe
10mm
1.948 0.042 0.283
15mm 5.941 0.129 0.139
22mm 13.604 0.295 0.084
28mm 21.991 0.478 0.062
Pipework insulation
The insulation requirements for Speedfit pipe are the
same as those for copper and should comply with
BS EN 806 and complimentary guidance form BS 8558,
and BS5422.
Concealed pipework
The flexibility of Speedfit pipe gives it the ability to be
threaded through concealed or inaccessible spaces
without disruption to surrounding structures, making
major savings in installation time.
Pipework can be ‘cabled’ through drilled holes in joists
and rafters. Therefore, pipework can be installed after
floorboards have been laid, working below the floor
before the ceiling is installed.
This makes site work far safer as the installer does not
have to balance on open joists with the risk of dropping
tools or equipment on other people below.
This will also eliminate the risk of damage by floorboard
nails. There is no need for dry runs since pipe can be cut
and connections made in-situ.
Rigid pipe, such as copper, can only be fed under floor in
short lengths. However, Speedfit pipe, being flexible, can
run from one fitting to another without having to install a
connector in between.
Speedfit needs no jointing materials, eliminating the risk
of fire from the use of a blowlamp, solder and flux.
Installers are also not exposed to the health issues related
to breathing in toxic flux fumes.