OEM part number

35CVS-12 3x5 concentric 12 in. straight pipe

Rinnai part 35CVS-12. Listed for 8 models below.

Rinnai E-Combi condensing combi boiler (E50CRN, E75CRN/CRP, E110CRN/CRP)

3x5 concentric 12 in. straight pipe. Fits all 8 models in the series:

E110CR E110CRN E110CRP E50CR E50CRN E75CR E75CRN E75CRP

Third-party vent product listed as approved: Simpson Dura-Vent

Source: Rinnai E-Combi Series Installation & Servicing Instructions (8U516009 V0116), page 87-88. Full E-Combi parts list

Part numbers are taken from the manufacturer’s published repair parts documents and are listed so you can identify the right part. Manufacturers replace and supersede numbers over time, so confirm the number with your distributor before you order, and use factory-authorized parts on equipment under warranty. Replacing gas, electrical and refrigerant parts is work for a licensed technician. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.