Installation Guide
24
JG Speedfit
Plumbing and Heating
Collet Covers: Collet covers provide added security against pipe
disconnection, e.g. the fittings coming into contact with rigid surfaces and
behind dry-lining walls. They are oered in white as standard and in red or
blue to provide colour coding of pipe.
Collet Clips: White and Grey collet clips are used with standard fittings to
prevent accidental pipe disconnection. Red or blue clips provide colour
coding of pipe. Red and blue clips should not be used to prevent accidental
release of pipe.
Continuously Operated Re-Circulating Systems (Secondary Hot Water
Circulation/Ring Main Installations): A continuously operated
re-circulating system is a water-replenished circulating system which is
maintained at a constant high temperature to provide a constant source of
hot water. Continuously operated re-circulating systems are used to
distribute constant hot water to draw o points that may be distant from
the source or hot water storage vessel. Continuously operated re-circulating
systems are very dierent from conventional hot water supply and central
heating systems found in domestic properties, for which our products have
been tested to, under either BS7291 2010 Class S or WRAS approval
standards, and for this reason Speedfit products must not be used on any
continuously operated re-circulating systems as they are not approved
under the current version of these standards.
System Testing: To ensure the pipework and fittings have been installed
correctly, whether it be on a new or extended system, it is essential that the
system is checked and hydraulically wet tested. Testing should be at 2 bar
for 10 minutes and 10 bar for 10 minutes. This testing, combined with other
relevant checks, should reveal installation problems and is regarded as good
plumbing practice. Speedfit Stop Ends and Plugs are particularly useful
during this operation, enabling all outlets and any fittings to be easily
plugged. However, system testing should not be regarded as a substitute for
correct installation. See also “Making a Good Connection”.
System Flushing: As is usual practice for any plumbing installation, flushing
of the system prior to the use of Speedfit is recommended to remove any
contaminants/chemical residue from elsewhere in the system.
British Gas Service has accepted the John Guest Speedfit fittings as being
suitable for open vented and sealed central heating systems and as eligible
for acceptance onto its service contracts.
Products within this Price List are designed for use within UK plumbing and
heating installations or in other countries where similar installation
requirements apply. For information on products suitable for use in other
countries please consult our Technical Advisory Service.
Vermin: Speedfit products should not be used in vermin infested areas.
Maximum Torque Figures (BSP & BSPT): Plastic threads are not generally
as strong as brass threads. Customers and end users should be aware of
this when choosing products for their applications. Overtightening of plastic
threads will cause undue stress and eventual cracking and leakage. The
maximum torque figures for BSP and BSPT threads used on Speedfit
plumbing products in mating threads conforming to relevant BS or
International thread standards are shown below.
Thread Size Maximum torque
Plastic 1/2" 3.0 Nm
3/4" 4.0 Nm
Brass 1/2" 4.0 Nm
3/4" 5.0 Nm
It is recommended that all installations are checked prior to use to
determine that a seal has been made.
Side Loads: John Guest products are not designed to be used whilst under
side load as this may adversely aect their ability to function long-term.
always ensure tubes have good alignment with the fitting. They must also
not be subjected to any form of impact or other damage, such as being hit
or dropped, even accidently. If fittings have been damaged or suered an
impact, they should be replaced immediately. John Guest warranty does not
cover loss caused by any form of damage.
Fittings for cold water services
Applications: Speedfit Fittings for Cold Water Services are designed to
connect MDPE pipes (MRS-PE80) used above or below ground, to convey
potable water from distribution mains to individual properties.
Pipes: The Fittings can be used with:-
• Blue pipe to BS EN 12201-2, 20mm PN16, 25mm and 32mm PN12.5.
Adaptors: Are available for:
• Copper to BS EN1057 and PEX or PB to BS7291.
• Screwed pipe.
• LDPE to BS1972 Class C and Class D in 1/2” and 3/4” sizes.
Fittings for PEX and Copper Pipe: Must not be buried into ground, soil,
concrete or other substrates.
Working Temperatures and Pressures: Maximum working pressure
16 Bar @ 20˚C.
Standards: The Fittings are approved by the Water Regulations Advisory
Scheme.
Performance: The fittings are manufactured from tough plastic material
well able to meet the stringent requirements of the water industry. They
have been approved by the WRAS and, as such, have passed the ‘pull out
test’ where a force shown below is applied to a connection between MDPE
pipes and a fitting for 5 minutes without the connection failing.
Size
Test force 20mm 25mm 32mm
Newtons 1900 2500 4100
Lbs 427 562 921
DO NOT USE FOR Gas, Fuel Oil or Compressed Air Applications or Hot Water
Chemical Eects: For below ground applications the fittings require no
additional preparations - coating etc. When used above ground, avoid
contact with aggressive chemical compounds. Protect from frost where
necessary. In the United Kingdom, potable water does not contain high
levels of chemicals (eg chlorine etc) that would adversely aect Speedfit
Underground Fittings.
Paint and Chemicals: Use only water or oil based paint. DO NOT ALLOW
CONTACT WITH jointing compounds, cellulose based paints, paint thinners
or strippers, solder flux, acid based descalents or aggressive cleaning
products, including those below pH4, high in hypochlorite (e.g. bleach) or
containing hydrogen peroxide. (See the DISINFECTION OF HOT AND COLD
WATER SYSTEMS section of the Product Guide installation advice for
specifically permitted disinfection procedures).
Exposure to Sunlight: Permanent exposure to direct sunlight will
necessitate lagging the fittings.
Pipe Inserts: Pipe inserts must be used and fully inserted on all connections
to MDPE, LDPE, PEX or PB pipe.
System Testing: Pressure test to 1.5 times working pressure for 10 minutes
before connecting to the mains supply. It is recommended that all pipe and
fitting installations are pressure tested after installation before handing over
to the final user
Maximum Torque Figures: The maximum torque figures for BSP and BSPT
threads used on Speedfit products are as follows:-
Size
Maximum torque
1/2 3.0 Nm
3/4 4.0 Nm
It is recommended that all installations are checked prior to use to
determine that a seal has been made.
The maximum torque figures quoted for use with Speedfit fittings are
dependent on the mating thread conforming to the relevant British
International thread standards.