10 Rheem Water Heater Code Compliant Vent Termination Kit For New Building Regulations of 2026 To Pass Final Inspection

1

Rheem RTG20282 Tankless 3 in. x 5 in. Vertical Vent

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  9.5
• Brand
  Rheem

Key specs2

Roof Penetration Hardware

• Flashing included for roof weatherproofing
• Storm collar deflects rainwater at the pipe joint
• Exhaust caps protect the vertical terminal

Vent Pipe Sizing

3 in. x 5 in. concentric

Pros & cons42

Pros

• Fits standard 3 in. x 5 in. concentric vertical venting runs
• Includes flashing, caps, and storm collar for weatherproofing the roof penetration
• Built with galvanized and stainless steel components for exterior durability
• Protected by an OEM 1-year limited warranty

Cons

• Requires separate purchase of additional vent pipe to complete the installation
• Vertical roof design cannot be installed horizontally through exterior sidewalls

2

Rheem RTG20292-1 Horizontal Vent Cone Kit, 2x8 Wall Tankless Heater

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  9.4
• Brand
  Rheem

Key specs2

Maximum Wall Thickness

Up to 10 inches

Directional Elbow

Comes with an integrated 90-degree elbow to transition the exhaust run directly through exterior sidewalls.

Pros & cons42

Pros

• Accommodates thick exterior walls measuring up to 10 inches
• Includes a 90-degree elbow to facilitate horizontal sidewall routing
• Direct OEM replacement engineered for Rheem, Ruud, and Richmond water heaters
• Factory-authorized genuine parts help maintain equipment warranty compliance

Cons

• Requires additional venting sections to complete the direct vent run
• Horizontal cone profile is not suitable for vertical roof venting layouts

3

Rheem RTG20291-1 Tankless Horizontal Vent Cone Termination Kit

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  8.9
• Brand
  Rheem

Key specs2

Construction Material

Features rugged all-metal components manufactured as genuine OEM factory-authorized replacement parts.

Installation Verification

Confirm exterior wall depth and specific model diameter requirements before installing this horizontal cone kit.

Pros & cons32

Pros

• Genuine OEM factory-authorized parts ensure proper component fit
• Rugged metal construction resists damage during mounting and exterior exposure
• Backed by a 1-year limited warranty from the manufacturer

Cons

• Maximum wall thickness limit is omitted and must be confirmed prior to purchase
• Vent pipe diameter sizing is not listed in the product specifications

4

Rheem RTG20274C Tankless Horizontal Vent Termination Kit

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  9.2
• Brand
  Rheem

Key specs2

Joint Sealing Design

Includes precision seal rings at every connection point to stop exhaust gas leaks and maintain code compliance.

Dual-Function Venting

Simultaneously brings in outside combustion air and discharges flue exhaust through a concentric stainless steel body.

Pros & cons42

Pros

• Concentric dual-pipe design pulls combustion air while expelling exhaust
• Integrated seal rings at connection points guard against flue gas leakage
• Low-profile horizontal exterior design minimizes wall protrusion
• Corrosion-resistant stainless steel construction extends service life

Cons

• Wall thickness compatibility is not stated in the product details
• Horizontal direct-vent design cannot be adapted for vertical roof venting

5

Rheem RTG20275 Tankless Concentric Vertical Termination Kit

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  8.9
• Brand
  Rheem

Key specs2

Vent Pipe Sizing

3 in. inner / 5 in. outer concentric

Gasket Protection

Equipped with a seamless precision-formed gasket engineered to deliver an airtight, leak-proof flue connection.

Pros & cons42

Pros

• Features an inner 3-inch exhaust diameter and outer 5-inch intake diameter
• Precision-formed seamless gasket creates an airtight, leak-proof joint
• Constructed from durable stainless steel to resist acidic flue condensation
• Backed by a 1-year limited warranty

Cons

• Vertical roof orientation cannot be routed horizontally through a wall
• Roof flashing and storm collar accessories are not listed as included in the kit

6

Rheem RTG20274D Tankless Horizontal Vent Cone Termination Kit

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  8.2
• Brand
  Rheem

Key specs2

Component Sourcing

OEM Genuine Factory Authorized Parts

Wall Penetration Check

Verify pipe diameter and wall clearance measurements against your specific Rheem heater manual before drilling.

Pros & cons42

Pros

• Genuine OEM factory-authorized components provide reliable direct-vent fit
• Rugged metal construction withstands harsh outdoor weather conditions
• Horizontal cone directs flue exhaust away from exterior building surfaces
• Covered by an OEM 1-year limited warranty

Cons

• Wall depth compatibility is not specified and requires verification before purchase
• Specific vent pipe diameter is omitted from the manufacturer specifications

7

Rheem RTG20280-1 Tankless Horizontal Vent Termination Kit

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  7.6
• Brand
  Rheem

Key specs3

Maximum Wall Thickness

Adjustable up to 10 inches

Unit Compatibility

Designed specifically for Rheem EcoSense Mid Efficiency tankless gas indoor direct vent units.

Included Mounting Gear

• 12-inch exterior wall plate
• Mounting screws for secure attachment
• 94-degree angled elbow fitting

Pros & cons52

Pros

• Designed specifically for Rheem EcoSense Mid Efficiency indoor tankless units
• Adjustable sleeve fits exterior walls up to 10 inches thick
• Includes a 12-inch wall plate and mounting screws for secure installation
• Supplied with a 94-degree angled elbow to maintain correct flue drainage slope
• Constructed with corrosion-resistant stainless steel components

Cons

• Engineered only for EcoSense mid-efficiency models, not condensing heaters
• Horizontal through-the-wall setup cannot be configured for roof exhaust

8

Rheem RXGY-G01 Water Heater & Furnace Horizontal Vent Termination Kit

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  7.6
• Brand
  Rheem

Key specs2

Piping Material Compatibility

3 in. PVC and ABS piping

Compatible Appliance Models

• Rheem tankless water heaters: RTGH-84DV and RTGH-95DV
• Rheem gas furnace series: RGRA, UGRA, RGRJ, and UGRJ
• Rheem gas furnace series: RGTA, UGTA, RGTJ, and UGTJ
• Additional furnace lines: RGFD, RGGD, RGRK, and RGTK

Pros & cons42

Pros

• Engineered for Rheem RTGH-84DV and RTGH-95DV condensing tankless water heaters
• Connects directly to standard 3-inch PVC and ABS condensing vent piping
• Compatible across multiple Rheem gas furnace series including RGRA and RGTA
• Compact exterior face measures 11-3/4 inches wide by 8 inches tall

Cons

• Plastic vent rating is not suitable for high-heat non-condensing metal vent lines
• Horizontal sidewall mounting only; incompatible with vertical roof runs

9

Rheem RTG20274A Tankless 3 in. x 5 in. Horizontal Vent

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  7.4
• Brand
  Rheem

Key specs2

Wall Framing Limit

Up to 5 inch exterior walls

Brand Interchangeability

Serves as an OEM genuine direct replacement across Rheem, Ruud, and Richmond tankless water heaters.

Pros & cons42

Pros

• Direct replacement part for Rheem, Ruud, and Richmond tankless water heaters
• Fits standard 3 in. x 5 in. concentric venting layouts
• OEM genuine factory-authorized part ensures proper fit and seal
• Backed by an OEM 1-year limited warranty

Cons

• Limited to exterior walls up to 5 inches thick, falling short on 2x6 framing
• Requires purchasing additional vent piping to complete the indoor-to-outdoor run

10

Rheem SP20286 3 Vent Termination Kit , Beige

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  7.6
• Brand
  Rheem

Key specs2

Replacement Part Number

Rheem / Ruud SP20286

System Verification

Cross-reference the SP20286 part number with your Rheem or Ruud HVAC manual to confirm piping fit before installation.

Pros & cons32

Pros

• Authentic OEM replacement 3-inch vent termination for Rheem and Ruud units
• Lightweight 1-pound housing simplifies handling and exterior mounting
• Standard 3-inch diameter matches compatible condensing intake and exhaust lines

Cons

• Exact water heater model compatibility is not detailed in the product listing
• Exterior wall thickness rating and mounting hardware are not specified

Last update on 2026-10-22 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Which Rheem vent termination kit is designed for horizontal versus vertical exhaust runs?

Vent orientation determines the exact termination kit your setup requires. For vertical roof terminations, the Rheem RTG20282 fits 3 in. x 5 in. concentric venting and includes roof flashing, exhaust caps, and a storm collar. Another vertical option is the RTG20275 concentric kit, which features a leak proof seamless precision formed gasket. For horizontal sidewall venting, the RTG20274A accommodates 3 in. x 5 in. concentric piping, while the RTG20274C offers a low-profile stainless steel concentric design.

How do you select a horizontal vent kit for specific wall thicknesses?

Wall construction depth dictates which kit fits your exterior penetration. The Rheem RTG20292-1 horizontal vent cone kit is configured specifically for 2x8 wall framing on direct-vent installations. For standard exterior penetrations requiring broad coverage, the RTG20280-1 includes a 12 inch wall plate complete with mounting screws to anchor the assembly securely. If your exterior wall assembly exceeds standard measurements, verify the required pipe extensions in your heater manual before cutting exterior holes.

Can you use PVC or ABS piping with any Rheem vent termination kit?

No, termination kits are built for specific vent piping materials. The Rheem RXGY-G01 horizontal vent termination kit measures 11-3/4 inches wide by 8 inches tall by 2-1/2 inches deep and is designed to fit PVC and ABS piping. Concentric models such as the RTG20274C and RTG20280-1 require stainless steel piping instead. When planning a best whole house tankless water heater installation, inspect the rating plate and exhaust collar to confirm whether the appliance uses plastic or stainless steel venting.

Are Rheem vent termination kits compatible with Ruud and Richmond water heaters?

Yes, several Rheem vent termination assemblies serve as direct factory replacements across multiple equipment lines. Both the RTG20274A horizontal kit and the RTG20292-1 horizontal vent cone kit are specified as direct replacements for Rheem, Ruud, and Richmond water heaters. Both of these kits require additional venting pipes to complete the run from the heater collar to the outside wall.

What components ensure a tight weather seal on vertical roof penetrations?

Vertical installations rely on dedicated exterior shielding and sealed pipe joints to prevent water intrusion. The Rheem RTG20282 vertical kit includes exterior flashing, storm collars, and termination caps tailored for 3 in. x 5 in. concentric piping. For joint integrity along the flue pathway, the RTG20275 concentric vertical kit integrates a leak proof seamless precision formed gasket to keep combustion gases and moisture safely contained.

Which kits provide rugged metal construction for horizontal exhaust points?

Heavy-duty exterior metal components protect the building envelope against heat and physical wear. The Rheem RTG20274D and RTG20291-1 horizontal vent cone termination kits both feature rugged metal construction for increased durability. For installations requiring high corrosion resistance, the RTG20280-1 utilizes durable stainless steel components paired with a 12 inch wall plate and mounting screws for a solid mechanical mount on the siding.