Installation Guide

Rinnai Australia 7 Flue Installation Manual
CONDENSATE DRAIN
Installation Method
(a) The drain line MUST NOT discharge onto electrical connections, earth stakes, copper pipes, concrete paths or
into a pond.
(b) The point of discharge from each drain line shall be located so that the release of condensate does not cause a
nuisance, is readily discernible and incurs no risk of damage to the building.
In view of (a) and (b), suitable points of discharge are deemed to be drains, sewers or pits.
(c) There shall be no tap, valve or other restrictions in any line.
(d) Each line shall fall continuously from the valve to the approved point of discharge.
(e) Drain lines shall not discharge into a storage water heater safe tray.
(f) The end of the condensate drain line shall be:
(g) Where discharging over a tundish or gully trap, drain lines shall have an air gap of a size at least twice the
diameter of the drain line.
Interconnection Of Condensate Drain Lines
Condensate drain lines from multiple water heaters may be joined together provided they conform with the
‘INSTALLATION’ requirements on page 6.
Common Stack Discharge
Where individual water heaters are installed in a multistorey building, the condensate drain lines may discharge into
a common stack, subject to the following:
(a) The discharge from the common stack is to a tundish, having a discharge line, that is not less than the size of
the common stack, directly connected to a fixture trap, and installed in connection with any adjacent soil or waste
stack.
(b) The discharge point of the common stack is such that any discharge is readily visible and not cause any
nuisance.
(c) The common stack is vented by extending the pipe upwards, above the roof level.
Tundish Drain Lines
The drain line from any tundish shall be not less than DN 20 or less than one size larger than that of the largest drain
line discharging into the tundish. Tundish drain lines shall comply with the ‘INSTALLATION’ requirements on
page 6.
Areas Subject To Freezing
In areas where water pipes are prone to freezing, the drain pipe from any valve shall be insulated and not exceed
300 mm in length. It shall discharge into a tundish through an air gap of not less than 75 mm and not more than 150
mm measured from the outlet of the drain pipe to the rim of the tundish.
(i) not lower than 200 mm or higher than 300 mm above an un-paved surface; or
(ii) not lower than 75 mm or higher than 300 mm above a gravel pit not less than 100 mm in diameter in a paved
surface.