Rinnai 229318 - 2/4" x 10" Condensing Vent Pipe Extension (PPtl) fits SENSEI RX VIL-2418ST It is not a four-zone

It is not a four-zone cam

Set screw thread pitch allows tighter securing of wires

It is commonly used beneath mulch

change the orifice

Rinnai 229318 - 2/4" x 10" Condensing Vent Pipe Extension (PPtl) fits SENSEI RX VIL-2418ST It is not a four-zoneUbbink Polypropylene concentric venting delivers a professional solution with improved safety and convenience. 2 4 in. (60 100) Ubbink Vent Components (for U. S.) For use with the following models: RX Series, RU199i (REU N3237FF US), RU180i (REU N2934FF US), RU160i (REU N2530FF US), RU130i (REU N2024FF US), RUR199i (REU NP3237FF US), RUR160i (REU NP2530FF US), CU199i (REU N3237FFC US), CU160i (REU N2530FFC US). RX Material of Inner Exhaust