HVACopediaAllied · Furnace troubleshooting
Joint cementing procedure for plastic vent pipe
What is going on
Cement joints per ASTM D2855. Time matters, so work fast once primer goes on.
Check in this order
- Measure and cut the vent pipe to length.
- Deburr and chamfer the pipe end so no ridges remove cement from the socket.
- Clean and dry the surfaces to be joined.
- Test fit and mark the fitting depth on the outside of the pipe.
- Apply a liberal coat of PVC primer (for ABS use a clean dry cloth) to the socket and pipe end to the marked depth. Do not let primer dry before cementing.
- Apply solvent cement lightly and evenly inside the socket, then a second coat to the pipe end.
- While both surfaces are wet, push the pipe fully into the socket within 20 seconds. Give PVC a 1/4 turn while inserting, but do not turn ABS or cellular core pipe.
- Wipe excess cement at the socket. A good joint shows a bead all the way around.
- Handle joints carefully until fully set.
Applies to: PVC, CPVC and ABS vent joints
More furnace guides
Take it to the job
All guides, error codes and tips work offline in the HVACopedia app.
Source: Allied 92G1UH installation manual, p. 19-20 (PDF p. 19-20). Written in our own words; check the manual for your exact model.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.