Facilities Resource Group Standard Series, Installation Manual, Page: 12 / 61

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TTS-S-IM V2 09.22
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The maximum vent length when using 3 in. (75mm) pipe is 150 ft.
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The maximum lengths are reduced by the number elbows used, as shown in the following table:
Acceptable Termination Types
The vent for each water heater may be terminated with any of the specialty terminations listed in the
table below. For full vent termination requirements, refer to the appliance Installation Manual.
Manufacturer Part Number Vent Diameter Material
Noritz PVT-HL 3” PVC
Noritz PVC-2CT 2” PVC
Noritz PVC-3CT 3” PVC
Noritz PVC-UCVK 2 or 3” PVC
Noritz PVC-2LPT 2” PVC
Noritz PVC-3LPT 3” PVC
IPEX 196984 2” PVC
IPEX 196985 3” PVC
IPEX 196256 2” or 3” PVC
Clearance Requirements Between Terminations (Horizontal)
When using 90 Elbows or Tee Fittings
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When venting individual units out the side of the building with separate intake and exhaust pipes,
maintain the exhaust pipes must be at least 1 ft (0.3m) above the intake pipes.
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Avoid locating the intake pipes directly below the exhaust pipe.
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The exhaust and intake must extend at least 3 in (75 mm) beyond the exterior of the building