John Mills Speedfit KM39767 - Manual (Page 10)

The Speedfit range includes a Double Check Valve
(Part No 15DCV) to enable installers to comply with Water
Regulation Schedule 2.15,
thus preventing contamination
o f
w a t e r a r i s i n g f r o m
back siphonage, backflow or
cross connection.
Washer
Hole dia.
15mm pipe 29mm
22mm pipe 36mm
28mm pipe 46mm
Cold water tank
The minimum distance to make a solder connection on
copper pipe inserted into a Speedfit Fitting is 450mm
(18 inches). Ensure that any residual flux solder is not
allowed to come in contact with the fitting. That same
measurement is the safe distance to use a freezer kit to
Speedfit Pipe.
Care should be taken when designing and installing a
central heating system where radiators are supplied by
pipe work which drops from an upper floor.
With this kind of system it is possible to trap air in the
upper floor pipe work. When the boiler is fired the increase
in pressure within the pipe caused by expanding air could
cause the pipe to burst.
It is therefore essential that the system be designed so
that any air can be removed from the system either
automatically or manually by installing automatic or
manual air vents at the highest points of the system.
Speedfit pipe should not be used to provide the discharge
from unvented cylinders, unvented water heaters and sealed
systems via the temperature relief and pressure relief values.
Speedfit recommend that mains supply pipework to unvented
water heaters (up to 15ltr capacity), be run in metal pipes.
Speedfit pipe should be connected to circulating pumps,
motorised valves in accordance with the section in this
book headed, “Connecting Plastic Pipe To Compression
Fittings”. If Speedfit pipe is not mounted on a supporting
structure, the pipe must be clipped close to the components’
connections to ensure adequate support and to assist in
the reduction of vibration.
For heavier equipment, ensure that appropriate metal
brackets provide full and independent support of the
components and that it does not rely solely on the pipework
for support.
To install the Speedfit Tank Connector, unscrew the nut
and push the body of the fitting through the tank hole with
the washer on the inside of the tank.
Hand tighten the nut onto the body. Push the pipe into
the connector.
Note: Hand tightening the nut onto the body is all that is
required. Further mechanical tightening will damage the fitting.
Maximum wall thickness of tank 4mm
IEE Guidance Note 7 provides useful guidance on the
design of electrical installations where there is increased
risk of electric shock. It recognises that the requirement
for supplementry bonding may be relaxed where metal
taps and plastic pipes supply other bathroom fittings.
Similarly a metal bath or radiator not connected to an
extraneous-conductive-part is not required to be connected
to the local supplementry conductors.
Metal
Pipe
Metal
Pipe
Speedfit Pipe and Fitting
Clip Clip
Earth Lead
The most common way of running pipework to a radiator
is to run both flow and return pipes central to the
radiator position.
Once the plasterboard is installed the pipes are passed
through the Speedfit Radiator Outlet Plate to exit
plasterboard without the need of unsightly holes.
Metal reducing sets which convert radiator valves from
15mm to 10mm are not suitable for use with Speedfit
Fittings or Pipe as they can cause damage to the plastic.
Pipe Supplementary Bond Comments
Material Required Between
Earth terminals of
protective conductors of
class I and of class II
equipment and accessible
exposed conductive parts
of the building structure.
Hot water pipe, central
heating pipes, earth
terminals of protective
conductors of class I and
class II equipment and
accessible exposed
conductive parts of the
building structure.
Central heating pipes, the
earth terminals of
protective conductors of
class I and class II
equipment and access to
exposed conductive parts
of the building structure.
All metal pipes,
earth terminals of
protective conductors
class I and class II
equipment, and accessible
exposed conductive parts
of the building structure.
All metal pipes,
earth terminals of
protective conductors of
class I and class II
equipment, and accessible
exposed conductive parts
of the building structure.
Bonding of metal taps
metal radiatorsor metal
baths is not required
unless the bath is
connected to the
metallic building structure.
A bond is not required
to the taps either hot
nor cold, or to metal
baths unless connected
to the metallic
building structure.
Bonding of metal water
taps is not required,
nor metal baths unless
connected to the metallic
building structure.
Metal pipes themselves
can be used as bonding
conductors if joints are
metal to metal and
electrically continuous.
Metal central heating
radiator does not
require bonding.
Cold Hot Central
Water Water Heating
P P P
P M M
P P M
M M M
M M P
P = Plastic M = Metal NB: All Waste Pipes are plastic.
1. Supplementary bonding is carried out to the earth terminal
of protective conductors of class I and class II equipment
within the bathroom. A supplementary bond is not run
back to the main earth.
2. Metal window frames are not required to be supplementary
bonded unless they are electrically connected to the
metallic structure of the bonding.
3. Metal baths supplied by metal pipes do not require
supplementary bonding if all the pipes are bonded and
there is no other connection of the bath to earth.
4. All bonding connections must be accessible and labelled
“Safety Electrical Connection - Do Not Remove”.
DROP-PIPE SYSTEMS
DISCHARGE PIPES
WATER HEATERS
CONNECTION TO PUMPS AND VALVES
CONNECTION TO COPPER PIPE
CONNECTING TO COLD WATER STORAGE TANK
PREVENTING BACK FLOW
RADIATOR CONNECTIONS
ELECTRICAL CONTINUITY CONT’D
SUPPLEMENTRY BONDING TO BATHROOMS
INSTALLING PIPEWORK
Speedfit Barrier Pipe is manufactured to BS 7291 Parts 1,
2 and 3 Class S and is Kitemarked.
The pipe is available in coils and straight lengths. See
pages 14. Pipe markings are spaced to aid the making of
a good connection when using a Superseal Pipe Insert.
15mm B-PEX to BS7291 : Part 3 : 1990 Class S 12 BAR 20°C - 4 BAR 82°C - 3 BAR 92°C
It is made up of 5 layers, the
centre of which is a blue
coloured oxygen barrier
which prevents the ingress
of air into the system, thereby
reducing the effect of corrosion
on metal components.
Because of it’s low thermal conductivity, when carrying
hot water, Speedfit Pipe is cooler and therefore safer to
touch. Relatively low heat loss through radiation means that
a system retains it’s heat longer and delivers hot water
more quickly and with less wastage than a metal system.
SPEEDFIT BARRIER PIPE
For general guidance on pipework sizing, please refer to
BS6700 or the Institute of Plumbing Engineering Services
Design Guide. Speedfit fittings are suitable for pipes
within ±0.1mm of nominal size. They can be used with
copper pipe to BS EN 1057 or Speedfit plastic pipe.
The Product Range List shows the fittings available for
reducing pipe diameters within the system.
Speedfit pipe is available in straight lengths and coils.
Pipe Diameter
Straights 2m - 15mm 22mm -
3m - 15mm 22mm 28mm
6m - 15mm 22mm 28mm
Coils 25m 10mm 15mm 22mm -
50m 10mm 15mm 22mm -
100m 10mm 15mm - -
120m - 15mm - -
150m - 15mm - -
PIPEWORK SIZING
17 18
22mm Barrier-PB to BS7291-2 2001 Class S 12 BAR 20°C - 4 BAR 82°C - 3 BAR 92°C
The pipes exit a single
gang box (fitted with rubber
grommets) located at the
mid height of the finished
radiator position. This also
provides a fixed point for
other trades to work to and
reduces the risk of damage
to the pipework.
Unvented pressurised cylinders can be installed using
Speedfit Pipe and Fittings. However, insertion depths on
compression joints that form part of the cylinder must be
checked prior to installation and the use of standard pipe
inserts (Prefix TSM) is recommended.
In accordance with current U.K. Building Regulations
(Part G), discharge pipes from temperature and/or pressure
relief valves must be run in metal pipework.
Speedfit connections to combined Cylinder/Boiler
units and Thermal Storage Units must be made outside
the casing unless otherwise stated in manufacturers
installation literature.
CONNECTION TO CYLINDER & WATER
HEATERS CONTINUED
The plumbing or heating system installer should have
these aspects checked to ensure compliance with current
IEE regulations. If in doubt please contact the Speedfit
Technical Advisory Service or your local Electricity Authority.
ELECTRICAL CONTINUITY
UNVENTED PRESSURISED CYLINDERS
Unvented Pressurised Cylinders can be installed using
Speedfit pipe and fittings. However if the safety
parameters of the cylinder exceed those of the pipe and
fittings it is possible to fit a pressure reduction valve on
the out going hot supply pipe. This will not interfere with
any other cylinder safety devices demanded by
regulations as they are all fitted in the incoming side of the
cylinder. Run a short length of copper pipe from the
cylinder connection (about 150mm - 300mm) then fit a
Honeywell DO5F pressure reduction valve. This will
protect the pipe and fittings from excessive pressure in
the event of boiler / cylinder malfunction. The factory
fitted temperature / pressure relief valve on the cylinder
will discharge below 100˚C therefore protecting the pipe
from excessive temperature.
JG Speedfit aluminium foil tape can be used to fulfil the
NHBC requirements for the identification of location of
plastic pipes in or behind a wall surface by a metal
detector. It features a bright aluminium finish, rubber/resin
high-tack adhesive and quality siliconised backing paper
to allow the easy handling of short, cut lengths.
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METAL FOIL TAPE