Rinnai 184118-S 18" Above Roof Discharge Plastic Termination

- Item #: BCI1840469

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18" Above Roof Discharge Plastic Termination

Rinnai's unique Ubbink concentric venting system provides maximum performance, safety, and ease of installation. Compatible with all indoor Rinnai water heater models, except the 98 series which utilizes separate intake and exhaust venting.

Plastic Outer Vent For Intake

  • Easy To Cut Compared To Stainless Steel
  • Dent And Impact Resistant
  • Corrosion-Proof
  • Non-Flammable Material (ul94-V0)
  • Seamless Extruded Materials
  • Casted Elbows And Adapters
  • White Semi-Gloss Finish (Eu Ral 9016)

Aluminum Inner Vent For Exhaust

  • Easy To Cut Compared To Stainless Steel
  • Stable, Thick-Walled Material
  • Dent And Crease Resistant
  • Not Affected By Scratches
  • Seamless Extruded Material
  • No Weld lines
  • Thick-Walled, Casted Elbows And Adapters
  • Lightweight
  • Seal Rings With Maximum Temperature 400°F (Approx. 200°C)


  • GSA Approved
  • Vertical Termination Through Roof
  • Easy Assembly
  • Professional Installation Recommended


  • Overall Length: 39.3"
  • Height Above Roof: 18"
  • Diameter: 4-7/8"

Additional Rinnai Links

Our SKU: Rinnai 184118-S

This product is listed under the following manufacturer number(s):

  • Rinnai 184118-S

*Denotes a finish or option that has been discontinued

Rinnai 184118-S Product Specifications

CSA Approved Yes
Configuration Termination
Diameter 4.875
Length 39.3
Pipe Inside Diameter 4
Product Weight 5
Vent Pipe Size 4

Installation Resource Center

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