Form 43471000
-28- May 2021
• A Y-connector must be used to the common vent.
2. Material for connectors and Y-connectors should be constructed of galvanized sheet metal or other approved
noncombustible corrosion resistant material as allowed by state or local codes. All common vent pipe
should be insulated flue pipe or double-wall, Type B vent.
3. Avoid unnecessary bends. Limit to two (2) 90º elbows.
4. The entire length of vent connector shall be readily accessible for inspection, cleaning and replacement.
5. Groups of heaters with a common vent must be controlled by a common thermostat.
If any heater connected to a common vent system for multiple
heaters is found inoperative, the heater should be disconnected from
the vent system and its entrance into the vent system capped.
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