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 6 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. For further
information contact your Building Control Office or
The British Board of Agrément.
Discharge at high level, i.e. 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 3m from any plastics guttering system
that would collect such discharges (tundish visible).
-16-
ALTERNATIVE DISCHARGE
SECONDARY RETURN
Downward discharges at low level, i.e. up to 100mm above external surfaces such as car parks, hard
standings, grassed areas etc, are acceptable providing that where children may play or otherwise
come into contact with discharges, a wire cage or similar guard is positioned to prevent contact, whilst
maintaining visibility.
5
6
4
3
2
1
HOT TAPS
HOT OUTLET
COLD INLET
FIGURE 4
FIGURE 5
1 Secondary Return Fitting use 1/2''F x 1/2'' M x 15mm Tee (not supplied)
2 Commissioning Valve
3 Non Return Valve
4 Circulation Pump
5 Secondary Return Line
6 Balanced cold supply for showers or bidet only
OSO HOTWATER (UK) LTD www.oso-hotwater.com
E15 Marquis Court
Team Valley Trading Estate
Gateshead
Tyne & Wear, NE11 0RU E-mail technical.uk@oso-hotwater.com
Phone: (0191) 482 0800 E-mail spareparts.uk@oso-hotwater.com
Fax: (0191) 491 3655 E-mail sales.uk@oso-hotwater.com
All replacement parts must be supplied by OSO HOTWATER (UK) LIMITED.
To obtain the address of a local stockist contact:
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