{"product_id":"rinnai-21-inch-non-condensing-horizontal-termination-diverter-kit","title":"Rinnai 21-Inch Non Condensing Horizontal Termination Diverter Kit","description":"\u003cp\u003eIn this review the Rinnai 223187 21-Inch Non Condensing Horizontal Termination Diverter Kit is examined for installers and homeowners who need a neat, code-friendly way to route flue gas horizontally from compatible indoor Rinnai water heaters. The bottom line: this kit is best for professional installation where a compact concentric venting solution is required, because it pairs a 21-in termination pipe with a 90 degree elbow and a rubber wall plate to provide \u003cstrong\u003ezero clearance to combustibles\u003c\/strong\u003e and a clean finished wall penetration.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e21-in termination pipe:\u003c\/strong\u003e Provides the required horizontal reach for installations where the vent exits through a wall, avoiding roof routing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90 degree elbow:\u003c\/strong\u003e Allows a right-angle change of direction to align the vent with the heater outlet while keeping the exterior termination compact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRubber wall plate:\u003c\/strong\u003e Creates a neat, weather-resistant finish at the wall penetration and helps seal around the concentric pipe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcentric Nubbin system compatibility:\u003c\/strong\u003e Works with most indoor Rinnai water heaters to combine intake and exhaust in a single compact run for simpler layout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero clearance to combustibles:\u003c\/strong\u003e Lets installers position the vent close to framing and finishes where local code permits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional installation recommended:\u003c\/strong\u003e Ensures proper alignment, sealing, and code compliance for safe venting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe kit is aimed at HVAC technicians and experienced plumbing professionals fitting indoor Rinnai water heaters that accept concentric venting, especially in retrofit or tight-space installations where a short horizontal termination is preferred. Its compact parts and zero-clearance rating make it suited to mechanical rooms and utility walls where space and clearance are constrained.\u003c\/p\u003e\n\u003cp\u003eHomeowners doing DIY work should take caution: the product description and design assume knowledge of proper venting practice and local code. This kit is not compatible with Rinnai 98 series units that require separate intake and exhaust venting, so those owners should look for the appropriate dedicated vent parts instead.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompact kit with a 21-in termination and elbow simplifies short horizontal runs and reduces material needs.\u003c\/li\u003e\n\u003cli\u003eConcentric Nubbin compatibility combines intake and exhaust for a tidy single-penetration install.\u003c\/li\u003e\n\u003cli\u003eRubber wall plate gives a finished appearance and helps weatherseal the exterior opening.\u003c\/li\u003e\n\u003cli\u003eZero clearance to combustibles allows flexibility in tight installation spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot suitable for the Rinnai 98 series, which requires separate intake and exhaust components.\u003c\/li\u003e\n\u003cli\u003eDesigned for professional installation, so DIY installers may need to hire a pro to meet code and ensure safety.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eRinnai\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e223187\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination pipe length\u003c\/td\u003e\n\u003ctd\u003e21 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElbow included\u003c\/td\u003e\n\u003ctd\u003e1 90 degree elbow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall finish\u003c\/td\u003e\n\u003ctd\u003eRubber wall plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClearance\u003c\/td\u003e\n\u003ctd\u003eZero clearance to combustibles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eProfessional installation recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Rinnai 223187 21-Inch Non Condensing Horizontal Termination Diverter Kit is a practical, value-minded choice for technicians installing compatible indoor Rinnai water heaters where a short, concentric horizontal termination is needed. Its included elbow, rubber wall plate, and zero-clearance rating make for a tidy, code-friendly termination when fitted by a professional.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this kit compatible with all Rinnai indoor models?\u003c\/strong\u003e\u003cbr\u003eIt is compatible with most indoor Rinnai water heater models but not with the 98 series, which requires separate intake and exhaust venting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install this myself?\u003c\/strong\u003e\u003cbr\u003eThe manufacturer recommends professional installation to ensure proper vent alignment, sealing, and compliance with local codes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the kit provide clearance to combustibles?\u003c\/strong\u003e\u003cbr\u003eYes, the kit is specified for zero clearance to combustibles, allowing close placement to framing and finishes where codes permit.\u003c\/p\u003e","brand":"Rinnai","offers":[{"title":"Default Title","offer_id":48261979341019,"sku":"B0082LSEM0","price":132.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51U28ChRh9L.__AC_SY300_SX300_QL70_FMwebp.webp?v=1776383774","url":"https:\/\/gearmusthave.com\/products\/rinnai-21-inch-non-condensing-horizontal-termination-diverter-kit","provider":"GearMustHave","version":"1.0","type":"link"}