Installation Guide

16
JG Speedfit
Plumbing and Heating
Pipe Hole diameter
15mm pipe 29mm
22mm pipe 36mm
28mm pipe 46mm
Drop-pipe systems
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.
Connection to pumps
and valves
Speedfit pipe should be connected to circulating pumps
and motorised valves in accordance with page 15,
‘Connecting to compression fittings’. If Speedfit pipe is
not mounted on a supporting structure, the pipe must
be clipped close to the component’s 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.
Connection to copper pipe
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.
Connecting to cold
water storage tank
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.
Preventing back flow
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 of water arising from back siphonage,
backflow or cross connection. Suitable for use with
fluid categories 1, 2 and 3 only.
Radiator connections
The most common way of running pipework to a
radiator is to run both flow and return pipes central
to the radiator position.
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.
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.
Washer
Hole
diameter
Cold water tank