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MANUALS (3)
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Product Highlights
Description
The Takagi brand has been discontinued by the manufacturer as of December 31, 2025. Suggested replacement units will be available on our website and replacement parts will continue to be available as supplies last. If you'd like any further assistance, please contact our customer service team.
The T-K3-OS features a built-in power venting system, but unlike any of its predecessors, the new tankless water heater does not require any additional Category III venting or vent caps, making installation one step easier for its installers.
It can provide an unlimited supply of hot water continuously because there is no storage tank to heat and reheat. The T-K3-0S starts heating water at 0.5 gallons per minute (GPM), and can keep that endless supply of hot water running from as low as 0.4 GPM up to a maximum flow rate of 7.0 GPM.
Takagi's newest tankless water heater also features a thermal rating of 83% for both liquid propane and natural gas, so it is extremely efficient and environmentally friendly. Since tankless water heaters only burn gas when hot water is needed, installing this unit can help homeowners save up to 45% on their monthly gas bills.
The T-K3-OS also offers four separate temperature settings, ranging from 113 to 167 degrees, so it does not require the use of a separate remote control.
Capacity: 2 to 3 Bathrooms
Natural Gas Input - Min. 11,000 Btu - Max. 190,000 Btu
LPG Input - Min. 11,000 Btu - Max. 190,000 Btu
Gas Connection - 3/4" NPT
Water Connection - 3/4" NPT
Natural Gas Pressure Inlet - Min. 5.0" WC - Max. 10.5"WC
Weight - 40 lbs
Dimensions - 20.5" x 13.8" x 8.5"
Ignition - Electronic Ignition
Electrical Supply - AC 120V (60 Hz)
Water Pressure - Min. 15 psi - Max. 150 psi
Natural Manifold Pressure - 2.8" WC
LP Manifold Pressure - 3.2" WC
Specs
| Application: | 2-3 Showers |
|---|---|
| Product Type: | Tankless Heater |
| Fuel Type: | Propane |
| Energy Factor: | 0.82 |
| Width: | 13.8" |
| Height (Inches): | 20.5" |
| Max Flow (GPM): | 7 |
| Min Flow (GPM): | 0.5 |
| Flow Rate: | 0.5-7 GPM |
| Amperage: | 0.67 |
| Voltage: | 120v |
| Depth (Inches): | 8-1/2" |
| Vent Size: | 4" |
| Vent Type: | Stainless Steel |
| Wattage: | 80 |
| Water Connection: | 3/4" |
| Gas Connection: | 3/4" |
| Gas Input: | 8" W.C. |
| BTU Input: | 190000 |
| Temperature Range (F): | 113°F - 167°F |
Questions?
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Product Q&A
4 QuestionsQ: How do I flush this Takagi?
Asked by daine 14 years ago
Add your answer
Verified Reply- PexSupply StaffPlease refer to page 24 of the manual linked below for recommendations from the manufacturer. http://s3.pexsupply.com/manuals/1279198160164/34870_PROD_FILE.pdf
Use vinegar. Buy it at Sam's club or Costco. 3 gallons should cost less than $10. Pour vinegar into a 5 gallon bucket. Put a small sump pump into the vinegar and use 5' washer hoses to hook up from your pump to hot water hose bib then from your cold water hose bib back to your bucket of vinegar with the pump in it. This will reverse flow the vinegar. Run for 30 minutes. Change your vinegar until it runs clear then flush it. Good luck! Sent via the Samsung Galaxy S™ II Skyrocket™, an AT&T 4G LTE smartphone.
Q: Curious about cold weather applications as well as warranty information. Thanks!
Asked by Jason Kicking Tires 16 years ago
Add your answer
Verified Reply- PexSupply StaffYou can find the information you are seeking in this manual: http://s3.pexsupply.com/manuals/1279198160164/34870_PROD_FILE.pdf
Q: I would like to install one of these in a home that is in our local mountains. The altitude is about 6000 feet. Will this unit operate at that altitude?
Asked by jasv 16 years ago
Add your answer
Verified Reply- PexSupply StaffYes, this unit will operate at that altitude.
Q: what is the average yearly maintenance cost for one of these?
Asked by Sue 16 years ago
Add your answer
Verified Reply- PexSupply StaffThe cost will depend on your specific technician, as well as the frequency of water heater use. The unit should always be assessed and serviced by a licensed technician.