17: Vertical Termination Of U-Vent And Combustion Air Pipe On A Pitched Roof - Rinnai RU80i Manual

Certified PVC/CPVC Vent Termination Options (continued)
To prevent possibility of condensate freeze-up, do not
install vent kits one above the other. Once the vent
terminal location has been determined, make holes
through the exterior wall to accommodate the vent
pipes. Vent pipes must exit exterior wall horizontally
only.
Pitched Roof Termination Clearances:
Exhaust Vent
Combustion Air
12" above
roof or
anticipated
snow level
Figure 17: Vertical Termination of U-Vent and
Combustion Air Pipe on a Pitched Roof
DO NOT use lubricant between two PVC/CPVC
components. Refer to cement manufacturer instruction
for specific instructions and handling.
Basic Instructions for Cementing Joints:
1. Cut pipe end square; smooth out jagged edges
and burrs. Chamfer end of pipe; then clean fitting
socket and pipe joint area of all dirt, grease, or
moisture.
2. After checking pipe and socket for proper fit, wipe
socket and pipe with cleaner-primer. Apply a
liberal coat of primer to inside surface of socket
and outside of pipe.
NOTICE
12" min
12" min
NOTICE
3. Apply a thin coat of cement evenly in the socket.
Quickly apply a heavy coat of cement to the pipe
and insert pipe into fitting with a slight twisting
motion until it bottoms out.
4. Hold the pipe fitting for 30 seconds to prevent the
tapered socket from pushing the pipe out of the
fitting.
5. Wipe all excess cement from the joint with a rag.
Allow 15 minutes before handling. Cure time will
vary according to fit, temperature, and Humidity
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