UTICA BOILERS USC SERIES Installation, Operation & Maintenance Manual page 31

VENTING INSTRUCTIONS
Figure 12 - Z-Flex® Z-vent™ Vent Pipe Components
Notes:
*1 : A condensate tee/drain is only needed when horizontal vent lengths exceed 10 feet.
*2 : Insert vent pipe in boiler venter outlet (vent adapter), apply silicone completely around edge of outlet and tighten clamp.
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