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T-KJr2-OS-NG 6.6 GPM Natural Gas Outdoor Tankless Water Heater
★★★★★ ★★★★★

T-KJr2-OS-NG 6.6 GPM Natural Gas Outdoor Tankless Water Heater


Items that are currently in-transit to our warehouse, are currently in-stock at a drop-ship vendor’s, or manufacturer's warehouse will be marked as "Available". These products will ship once your order is processed (usually within 24-48 business hours). For any exceptions to this timeframe, an ETA (Estimated Time of Arrival) for your order will be emailed with accurate shipping dates in order to ensure that you are always updated and informed as to when your order will arrive at its final destination.

Quick Ship Eligible

Items labeled Quick Ship will ship within 2 business days from our East Coast warehouse. Actual delivery times will vary based on your location. If you are ordering multiple items and not all items qualify for Quick Ship, the order will ship when all items are available to ship. Quick Ship may not apply to multiple quantities of the same product.

Quick Specs: View More

  • Width: 13.8"
  • Height: 20.5"
  • Depth: 6.7"

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Released in 2010, the T-KJr2-OS are the smallest water heaters in the Takagi tankless line. This small, but powerful unit can meet all the hot-water needs of a small American home or apartment with one or two bathrooms. Designed to virtually do anything a 40-gallon tank-type water heater can do and more, the compact, wall mounted T-K Jr. can support hydronic baseboard or radiant floor heating applications, as well as provide domestic hot water to plumbing fixtures and appliances.   Available at AppliancesConnection


  • Natural Gas Input: (Minimum) 19,500 Btu
  • Natural Gas Input: (Maximum) 140,000 Btu
  • Gas Connection: 3/4" NPT
  • Water Connection: 3/4" NPT
  • Dimensions: 20.5" x 13.8" x 6.7"
  • Ignition: Electronic Ignition
  • Electrical Supply: AC 120V (60 Hz)
  • Outdoor Installation


Configuration Tankless Water Heater
Default Temperature 122° F
Depth 6.7
Direct Vent No
Fuel Type Liquid Propane, Natural Gas
Gas Connection 3/4" NPT
Height 20.5
Ignition Type Electronic Ignition
Indoor Installation No
Liquid Propane Pressure (Max) 14.0 WC
Liquid Propane Pressure (Min) 8.0 WC
Low Lead Compliant Yes
Maximum Flow Rate 6.6 GPM
Maximum Gas Input 140000 BTU
Natural Gas Pressure (Max) 10.5 WC
Natural Gas Pressure (Min) 5.0 WC
NG Energy Factor 0.81-0.83
Outdoor Installation Yes
Power Supply AC 120V
Product Weight 33
Temperature (Max) 140° F
Temperature (Min) 113° F
Theme Tankless Water Heaters
Water Pressure (Max) 150 PSI
Water Pressure (Min) 15 PSI
Width 13.8


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Overall Rating ☆☆☆☆☆ ★★★★★ 4.6
Ease of Use 4.6
Meet Expectations 5.0
Bang for Your Buck 5.0
Average rating out of 5 reviews

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Customer Reviews

 from La Mesa, CA
Overall Rating: ☆☆☆☆☆ ★★★★★ 5
Ease of Use: 5
Meet Expectations: 5
Bang for Your Buck: 5

Recommended Product:

I am so happy I decided to purchase this Takagi water heater. It is a great value and is of incredible quality. This was so worth the purchase and I am excited to order via Appliances Connection's website for future items that I need. I am very satisfied and recommend it to anyone!

Was this helpful? 👍 2 👎 1

 from Southfield, MI
Overall Rating: ☆☆☆☆☆ ★★★★★ 4
Ease of Use: 4
Meet Expectations: 5
Bang for Your Buck: 5

Recommended Product:

I believe that the Takagi water heater performs better than any other. I am very satisfied that it arrived safely, in perfect condition and on time. I was also pleased that the drivers were extremely polite and helpful. I have an old home and this heater does a very good job heating all areas up and making the winter so much more comfortable. I highly recommend it to anyone!

Was this helpful? 👍 2 👎 2

 from Buhl, MN
Overall Rating: ☆☆☆☆☆ ★★★★★ 5
Ease of Use: 5
Meet Expectations: 5
Bang for Your Buck: 5

Recommended Product:

I have bought three of these for use in my home and rental houses. They are a great value and perform extremely well. I am stoked, so far, with the outstanding service I received from Appliances Connection. Fantastic deal!

Was this helpful? 👍 1 👎 1

 from Toledo, OH
Overall Rating: ☆☆☆☆☆ ★★★★★ 5
Ease of Use: 5
Meet Expectations: 5
Bang for Your Buck: 5

Recommended Product:

I bought this item, so far, it works amazing. I was able to use existing gas lines, water lines, and vents and this made the job easier of course. It was great to order online, and the service I received was fabulous!

Was this helpful? 👍 0 👎 0

 from Chicago, IL
Overall Rating: ☆☆☆☆☆ ★★★★★ 4
Ease of Use: 4
Meet Expectations: 5
Bang for Your Buck: 5

Recommended Product:

I found this item had top quality workmanship, and came with the best instruction booklet ever seen. I like it and expect to save a lot of money on my water bills. I whole heartedly recommend it!

Was this helpful? 👍 0 👎 0

1-5 of 5


  • Brand:Takagi
  • UPC:671657108236
  • Stock Id:256050
  • Product Number:TKJR2OSNG


  • Fuel Type:Liquid Propane, Natural Gas


  • Width:13.8"
  • Depth:6.7"
  • Height:20.5"

    Technical Details

  • Configuration:Tankless Water Heater
  • Ignition Type:Electronic Ignition
  • Outdoor Installation:Yes
  • Temperature:(Max) 140° F
  • Power Supply:AC 120V
  • Product Weight:33 lbs
  • Low Lead Compliant:Yes
  • Direct Vent:No
  • Maximum Flow Rate:6.6 GPM
  • Gas Connection:3/4" NPT
  • Maximum Gas Input:140000 BTU
  • Default Temperature:122° F
  • Indoor Installation:No
  • Liquid Propane Pressure:(Max) 14.0 WC
  • Natural Gas Pressure:(Max) 10.5 WC
  • NG Energy Factor:0.81-0.83
  • Water Pressure (Max):150 PSI
  • Water Pressure (Min):15 PSI
  • Weight:38.00 lbs