Installation manual
Rinnai New Zealand Ltd. Continuous Flow Water Heater Installation Manual:
03-11
12
Condensate drain - EF models only
The Rinnai Innity EF water heaters generate condensate continuously at a rate of up to ve
litres per hour as a by-product of a highly efcient gas burner. Condensate must be drained via
a pipe to a suitable discharge point.
As condensate is a by-product of gas combustion it is mildly acidic. For this reason copper tube
and ttings MUST NOT be used as it will corrode. Instead Rinnai recommend plastic pipes and
ttings.
Important considerations for condensate drain pipe
Content of AS3500.4.2003 section 5.12 ‘Temperature/Pressure Relief and Expansion Control
Valve Drain Lines’ has been used as a guide in preparing these considerations.
A) Water heater drain outlet connection, ½ ˝ (15 mm) BSP male.
B) PE ½ ˝ BSP (15 mm) female to barbed ignition system connector (13-19 mm) or
equivalent plastic fitting.
C) Drain pipe and fittings to match (B).
D) Continuous fall of at least 2° from water heater to discharge point, length and bends in
accordance with those stated below.
E) Suitable points of discharge are deemed to be sewers or pits. DO NOT discharge onto
electrical connections, earth stakes, copper pipes, concrete paths or into a pond.
Maximum length and changes of direction greater than 45°
Length and Changes of Direction
Maximum length (m) 9 8 7 6
Maximum changes of direction (> 45°) 3 4 5 6