Troubleshooting guide

18
(d) Continue connecting pipe sections together with clamps and supporting with hangers. Follow the same
procedure described in the previous steps for inserting and connecting the flue tubes inside the outer vent pipes.
Install one section at a time with the outside pipe first, followed by the inside flue pipe.
(e) The last pipe section may be cut to fit the distance required to reach the water heater vent connections. First,
install the supplied condensate trap with the crimped end into the gasketed end of the elbow (horizontal vent
installations) and clamp the condensate tee and elbow together. Then install the crimped end of the elbow into
the vent connection of the water heater. On vertical vent installations, install the crimped end of the condensate
trap directly onto the water heater vent connection.
(f) Carefully measure the length of straight vent pipe needed allowing for about 2 in. (5.1 cm) insertion into the
elbow. Mark the ungasketed end of the pipe to be cut and carefully make a straight cut on the outside pipe to
the desired length. Remove the inside flue tube and cut each pipe separately. Then cut the inside flue pipe
about 1 in. (2.5 cm) longer than the outside pipe so that the flue pipe protrudes slightly beyond the outside pipe.
Reinsert the inside flue pipe into the outside vent pipe. Connect the outside vent pipe and clamp at each end.
(g) Use the large clamp supplied in the vent kit with the stepped gasket to seal the elbow or condensate trap to the
blower vent connector. The larger step of the gasket seals the vent pipe to the cast vent adapter.
(h) Condensate disposal: Connect either a 1 1/4 inch (3.2 cm) slip joint drain connection or a 1 inch (2.5 cm) PVC
compression coupling from the condensate trap nipple to 1” (2.5 cm) PVC piping to a drain or condensate
disposal pump. Install a drain trap after the condensate fitting to seal the venting system. Some local codes
may require a condensate neutralizer before allowing the condensate to be disposed down the drain. Contact
your plumbing professional.
Figure 11
IMPORTANT - In order for the condensate trap to collect and dispose of the condensate from the vent pipe, the
venting system must have a downward slope of 1/4 in. per ft. (21 mm/m) toward the condensate trap. The
condensate trap must be installed as close as possible to the vent adapter to prevent condensate from accumulating
and draining into the vent adapter or blower.
NOTICE
A trap or loop must be installed for the condensate drain to prevent leakage of potentially hazardous flue products
from being discharged into the room.
CAUTION