General Info

Products listed on pages 4 to 7
Fittings and pipe should be kept clean and undamaged
before use.
•Sizes: 1/2" to 1" CTS.
•Pipes: Speedfit fittings can be used with: PEX, Copper and
CPVC Pipes conforming to ASTM Standards.
Speedfit fittings cannot be used on stainless steel pipe.
•Standards: Speedfit products are designed and
manufactured under a fully integrated system assessed
by B.S.I. to BS EN ISO9001. Speedfit PEI Fittings and
Speedfit PEX Pipe are also NSF-14 and NSF-61, IAPMO
and ICC listed.
•Do not use for gas, fuel oil or compressed air applications.
•Working pressures and temperatures:
Application Max. Pressure Max. Temperature
Water 160 psi 73° F
Water 100 psi 180° F
Water 80 psi 200° F
•Burst Pressure (fittings): With copper or plastic pipe at
68°F, Speedfit fittings used with copper or Speedfit Pex
Pipe will withstand pressures well in excess of normal
service conditions.
•Insulation: Should comply with applicable standard for
copper.
•Minimum bend radius (PEX):
Pipe diameter 1/2" CTS 3/4" CTS
Min radius 7" 9"
•Clip spacing (in inches):
For surface mounted pipes.
Clip Spacing
Pipe Diameter Horizontal Run Vertical Run
1/2" CTS 16 inches 20 inches
3/4" CTS 20 inches 30 inches
1" CTS 30 inches 36 inches
•Expansion (PEX Pipe): 1% on length between 68°F and
180°F.
•Flow rates: Comparable with metal systems.
•Cleaners, inhibitors and descalents: For advice on the
use of additives such as corrosion inhibitors, the additive
manufacturers should be consulted.
•Paint and Chemicals: Use only water-based paint.
DO NOT ALLOW CONTACT WITH jointing compounds,
cellulose-based paints, paint thinners, paint strippers,
solder flux, acid-based descalents or aggressive
cleaning products.
•Solder Flux: No fluxes of any type should come into
contact with Speedfit products. Extreme care should
be taken to ensure that no such contact takes place.
•Chlorine: Speedfit is not suitable for use in systems where
the water contains high levels of chlorine, e.g. swimming
pools, fountains, etc.
•Exposure to light: Speedfit products, when used indoors,
are not affected by sunlight. When used outdoors, protect
from ultraviolet light by lagging or painting.
•Pipe clips: Pipe clips should not be fitted any closer than 2
1/2 inches from the end of the fitting. Pipe should be
adequately supported by pipe clips to prevent undue
stress (side load) on fittings.
•Pipe inserts:
Plumbing: John Guest recommends the use of pipe inserts
for PEX pipe connections with John Guest Speedfit
products in Standard Residential Plumbing (hot and cold
water) installations.
Heating: John Guest requires the use of pipe inserts for
PEX pipe connections with John Guest Speedfit products in
all Heating installations.
•Metal Joists: When ‘cabling’ plastic pipe through metal
joists, ensure rubber grommets are in place to prevent
damage to the pipe.
•Connection to boilers: A minimum 36 inches run of copper
pipe must be installed between the boiler and the Speedfit
system.
•Connection to copper pipe: 18 inches is the minimum
distance to make a solder connection on copper pipe
inserted into a Speedfit fitting. Ensure that no solder flux
comes into contact with the fitting.
•Concrete and masonry: Speedfit pipe and fittings can
be laid in concrete and masonry providing they are installed
in conduit pipe with access boxes for the fittings. This is to
enable the pipe to expand and provide accessibility for both
pipe and fittings. Fittings and pipe should be removable
for possible replacement. Insulation is also recommended
to protect against heat loss and the effects of frost. Fittings
not to be used underground.
•Electrical Continuity: If Speedfit is used in an existing
metal system, electrical continuity must be reinstated.
• 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 be checked
and hydraulically wet tested. Testing should be at 30 psi
for 10 minutes and 150 psi for 10 minutes. This testing,
combined with other relevant checks, should reveal
installation problems and is regarded as good plumbing
practice. 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.
• Vermin: Speedfit products will need special protection in
vermin infested areas.
• Tube Insertion Depths:
Twist and Lock Fittings 1/2" CTS 3/4" CTS 1" CTS
Tube Insertion Depth 1 1/4" 1 5/8" 1 5/8"
End Caps 1/2" CTS 3/4" CTS 1" CTS
Tube Insertion Depth 1 1/8" 1 1/2" 1 1/2"
Brass Fittings 1/2" CTS 3/4" CTS 1" CTS
Tube Insertion Depth 1 1/8" 1 1/2" 1 1/2"
• Side Loads: Fittings should not be subject to excessive
side loads and they should not be used as support
brackets. Tubing should be adequately supported to
prevent excessive side loading.
John Guest USA, Inc., is not responsible for misprints or
typographical errors.
16.
TECHNICAL CHECKLIST INCH SIZE
PLUMBING AND HEATING FITTINGS