Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to eight tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor, and longer vent lengths than ever possible with single-unit tankless water heater venting.

Exactly what I needed for the job and great price too. John. Mon Dec 08 2025

Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. Ubbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience. This accessory allows for 19.5 in concentric vent pipe extension.

This worked perfectly for our tanless water heater. William. Abilene, KS. Tue Nov 30 2021

Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to 8 tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor, and longer vent lengths than ever possible with single-unit tankless water heater venting.

Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to 8 tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor, and longer vent lengths than ever possible with single-unit tankless water heater venting.

Great product that I could not find locally. Chris. Portland, OR. Fri Jun 30 2023

Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to eight tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor, and longer vent lengths than ever possible with single-unit tankless water heater venting.

perfect unit for our needs no problems with the instalation. Arnold. ON. Thu Dec 17 2015

Great looking drain which matches the faucet I purchased.. David. San Anselmo, CA. Mon Apr 24 2017