Concentric vent kit · Rheem

Rheem RTG20270B Concentric Vent Pipe

Concentric vent kit

Concentric vent kit

Updated October 2026

The short answer

A practical concentric vent kit for installing or servicing a tankless heater.

Delivers
Concentric vent kit.
Watch for
Fit depends on the heater model.
Suits
Installing or servicing a tankless heater.
Venting
Concentric Vent
Material
Stainless Steel
Dimensions (seller)
8"W x 13"H
Product weight
2 lb
Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

What it delivers

The Rheem RTG20270B Concentric Vent Pipe is a concentric vent kit.

Vent parts must be the ones the heater's installation manual lists for that model, in the lengths and fittings it allows.

A concentric termination runs combustion air in and exhaust out through one opening, one pipe inside the other; condensing heaters usually take plastic, non-condensing indoor heaters the maker's stainless system.

Also on the listing: material: Stainless Steel; model: RTG20270B.

The listing gives dimensions of 8 in (W) x 13 in (H), a weight of 2 lb and hardware and instructions when applicable in the box.

Right unit for this house?

Install it when

  • Installing or servicing a tankless heater
  • Matching a part named in the manual

Look at another unit when

  • Heaters it doesn't name

Strengths and trade-offs

Strengths

  • Concentric vent kit

Trade-offs

  • Fit depends on the heater model

Install limits

  • Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.

Rated performance

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model numberRTG20270BRetailer
Dimensions (seller)8"W x 13"HRetailer
Features (seller)Leak-proof Seamless Gasket, Stainless Steel Construction, Easy InstallationRetailer
Product weight2 lbRetailer
MaterialStainless SteelRetailer
VentingConcentric VentRetailer

Rival units at this flow

More venting and install parts rated for similar demand

Full venting and install parts spec grid · Every Rheem unit in the catalog

Final verdict

A practical concentric vent kit for installing or servicing a tankless heater.

Buy this unit

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

Will the Rheem RTG20270B Concentric Vent Pipe fit my heater?
Only if its listing or maker names your heater model or series. Check the part number in your heater's installation manual.