Rinnai - 223182 - Universal Horizontal Termination Kit 21" 39" Houzer lists it as the

Houzer lists it as the optional bottom grid for that sink

With a standard Seal-A-Matic (SAM) check valve to prevent low-head drainage

reversible hardwood construction

Wiring may be extended up to 2

The controller instantly recognizes the new stations

Rinnai - 223182 - Universal Horizontal Termination Kit 21" 39" Houzer lists it as theLong termination kit for Rinnai tankless water heater venting in the shape of an L to go outside of side wall. Inner exhaust material is aluminum and outer intake material is plastic. Measures 21" Inner Exhaust Material: Aluminum Outer Intake Material: Plastic Actual product color may vary from that shown. This venting works with V Series Rinnai & RL Series Rinnai indoor units.