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6.13 Condensate Piping
• Use materials acceptable to authority having jurisdiction. In
absence of such authority:
• USA - PVC or CPVC per ASTM D1785/D2845 Cement or
primer per ASME D2564 or F493.
• No external trap needed
if the drain line is connected
to an open drain or condensate pump. If the boiler is
plumbed directly to a drain line in the building follow
local code on the installation of an external trap
.
• Connect condensate piping to 3/4" PVC for 160/200 or
1/2" PVC for 125/150 as shown.
• Slope condensate drain pipe minimum 1/4" per foot
(21mm/m) away from boiler.
• Support condensate pipe to eliminate any sagging.
•
Use field source condensate pump, designated for use with
condensing boiler, if boiler located below disposal point.
•
Condensate pump should have overflow switch.
Condensate from Boiler is slightly acidic and may cause
property damage if overflow.
• Manufacturer recommends the installation of a condensate
neutralizer for all installations. Follow local code when to
determine if a condensate neutralizer is required.
FIGURE 6-19 CONDENSATE DRAIN
6 - COMBUSTION AIR AND VENT PIPING
Condensate Tee
(Field installed)
on condensate
drain pipe
Do not glue cap
on if used for
dust protection.
End must be left
open
Do not place in
environment with
temperatures
below freezing.
Condensate
outlet will block
if condensate
freezes.
NOTICE
Manufacturer requires an air vent be used to prevent
condensate line vacuum lock.
3/4" PVC
PN 240012363 REV. B [03/29/2019]
