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Servicing should only be performed by a Qualied Service Agent
CONCENTRIC VENTING
Concentric venting allows for a single wall penetration. For multiple water heater installation using this vent
practice any additional vents of this type may be located 12" on centerline to either side of the first vent or
12" on centerline vertically above the first vent. Concentric kits may be extended to a maximum allowable
length of 5 feet (152 cm). Schedule 40 PVC pipe must be carefully measured and cut to the desired length.
Do not use couplings when extending the length of a concentric termination. The use of couplings will
restrict the flow through the termination and may cause improper combustion.
SUF Concentric Vent for 120 through 300.
SUF Concentric Vent for 400 through 500.
Figure 1