Dimplex SUTP Mid Range Installation Manual page 7

(b) Have a vertical section of pipe at least 300 mm long below the Tundish before any elbows or bends
in the Pipework.
(c) Be installed with a continuous fall
(d) Have discharges visible at both Tundish and the final point of discharge, but where this is not
possible or practically difficult, examples of acceptable discharge arrangements are:
- Ideally below a fixed grating and above the water seal in a trapped gully
- Downward discharge at low level, i.e. up to 100 mm above external surfaces such as car
parks, hard standings, grassed areas, etc. are acceptable providing that where children play
or otherwise come into contact with discharges, a wire cage or similar guard is positioned
to prevent contact whilst maintaining visibility.
- Discharge at high level, e.g. into a metal hopper and metal down pipe with the end of the
discharge pipe clearly visible (Tundish visible or not) or onto a roof capable of
withstanding high temperature discharges of water and 3 m from any plastic guttering
system that would collect such discharges (Tundish visible).
- Where a single pipe serves a number of discharges such as in blocks of flats, the number
served should be limited to not more than six systems so that any installation discharging
can be traced reasonably easily. The single common discharge pipe should be at least one
pipe size larger than the largest individual discharge pipe to be connected. If unvented hot
water stored systems are installed where discharges from safety devices may not be
apparent i.e. in dwellings occupied by blind, or disabled people, consideration should be
given to the installation of an electrically operated device to warn when discharge takes
place.
Warning Notice – The discharge will consist of scalding water and steam. Asphalt, roofing felt and
non-metallic rainwater goods may be damaged by such discharges.
Typical discharge pipe arrangement.
Fig 2
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