Rinnai INFINITY A-Series Installation Manual page 13

Interconnection of condensate drain lines
Condensate / neutraliser drain lines from multiple water heaters may be joined together provided
they conform with the requirements detailed on the previous page.
Common stack discharge
Where individual water heaters are installed in a multi-storey building, the condensate / neutraliser
drain lines may discharge into a common stack, subject to the following:
• 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.
• The discharge point of the common stack is such that any discharge is readily visible and will
not cause any nuisance.
• The common stack is vented by extending the pipe upwards, above the roof level.
Tundish drain lines
The drain line from any tundish shall not be less than DN 20 or less than one size larger than
that of the largest drain line discharging into a tundish. Tundish drain lines shall comply with the
requirements detailed on the previous page.
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.
Rinnai INFINITY EF26 and A-Series installation guide 01-20 | 13