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6.16 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 hose, hose clamps, and coupling to
boiler drain trap as shown in figure 6-32.
• Connect condensate piping to 3/4" NPT coupling 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 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.
• Field source condensate neutralizing kit as required
by authority having jurisdiction or for environmentally
friendly condensate disposal.
FIGURE 6-32 Condensate Drain
6 - COMBUSTION AIR AND VENT PIPING
NOTICE
Manufacturer requires an air vent be used to prevent
condensate line vacuum lock.
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.
3/4" PVC
PN 240012369, REV A [08/31/2018]
