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Takagi Tankless Water Heaters - Index

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Customers who have purchased tankless water heaters have also been:
to Takagi T-KJr. small tankless water heater - to water heater isolation valves
to Takagi TK3-OS outdoor tankless water heaters - to Takagi T-K3 (TK3) tankless water heater
to Takagi Mobius T-M32 multi-unit tankless water heater - to Takagi tankless water heater accessories - to tankless water heater index page
to other water heating products - to water heater gas flexes - to scald prevention valves - to drain pan for tankless water heaters
to Rheem tankless water heaters - to gas venting products - to recirculation pumps for tankless water heaters

Low rates and easiest to calculate/understand shipping/handling for tankless water heaters


Tankless water heaters were once the wave of the future, but now they are gaining in popularity every day as homeowners and business owners alike discover the benefits of instant water heating technology. Takagi is a leader in the industry for the best in tankless water heating, and there are many units to choose from. PlumbingSupply.com is your source for Takagi tankless water heaters that are good for your energy budget, and good for the environment!

Takagi T-K3 tankless water heater
Takagi T-K3
Tankless Water Heater
Takagi T-K3-SP tankless water heater
Takagi T-K3-SP
Tankless Water Heater
Click for the TK3-OS
Takagi TK3-OS
Tankless Water Heater
 
Takagi T-K Jr. tankless water heater
Takagi T-K Jr.
Tankless Water Heater
Takagi T-K3-PRO tankless water heater
Takagi T-K3-PRO
Tankless Water Heater
Takagi Mobius tankless water heaters models TM32
Takagi Mobius TM32
Tankless Water Heaters
 
Accessories for Takagi tankless water heaters


Takagi Tankless Water Heater Comparison Chart
Model Comparison Details
Max BTU
(NG)
Min BTU
(NG)
Flow Rate
GPM)
1st Hour
Rating
Energy
Factor
Thermal
Efficiency
Net
Weight
Dimensions
(H x W x D)"
FLASH T-K Jr 140,000 19.500 0.75 - 5.8 181 gal/hr
(77°F rise)
NG: 0.81
LP: 0.81
NG: 83%
LP: 84%
30 lbs 20 x 14 x 6
FLASH T-K3 199,000 11,000 0.50 - 7.0 257 gal/hr
(77°F rise)
NG: 0.82
LP: 0.84
NG: 86%
LP: 87%
40 lbs 20.5 x 13.8 x 8.5
FLASH T-K3-OS 190,000 11,000 0.50 - 7.0 246 gal/hr
(77°F rise)
NG: 0.83
LP: 0.83
NG: 82.6%
LP: 83.3%
40 lbs 20.5 x 13.8 x 8.5
FLASH T-K3-SP 190,000 11,000 0.50 - 7.0 240 gal/hr
(77°F rise)
NG: 0.81
LP: 0.82
NG: 82.3%
LP: 83.8%
40 lbs 20.5 x 13.8 x 8.5
MOBIUS T-K3-PRO 199,000 11,000 0.50 - 7.0 252 gal/hr
(77°F rise)
NG: 0.827
LP: 0.833
NG: 82.3%
LP: 83.6%
40 lbs 20.5 x 13.8 x 8.5
MOBIUS T-M1
Discontinued
235,000 25,000 0.75 - 9.6 300 gal/hr
(77°F rise)
NG: 0.81
LP: 0.82
NG: 82.3%
LP: 84.7%
70 lbs 24 x 18 x 9
MOBIUS T-M32 240,000 24,000 0.50 - 9.0 300 gal/hr
(77°F rise)
NG: 0.82
LP: 0.84
NG: 82.2%
LP: 83.9%
56 lbs 23.6 x 18.5 x 8.9


Takagi Tankless Water Heater Flow Rate Guide (Temp Rise vs GPM)
Model Temperature Rise (F°)
35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110
FLASH T-K Jr G

P

M
5.8 5.7 5.1 4.6 4.2 3.8 3.5 3.3 3.1 2.9 2.7 2.6 2.4 2.3 2.2 2.1
FLASH T-K3 7.0 7.0 7.0 6.5 5.9 5.4 5.0 4.7 4.3 4.1 3.9 3.6 3.5 3.3 3.1 3.0
FLASH TK3-OS 7.0 7.0 6.9 6.2 5.7 5.4 4.8 4.4 4.1 3.9 3.7 3.5 3.3 3.1 3.0 2.8
FLASH T-K3-SP 7.0 7.0 6.9 6.2 5.7 5.4 4.8 4.4 4.1 3.9 3.7 3.5 3.3 3.1 3.0 2.8
MOBIUS T-K3-PRO 7.0 7.0 6.9 6.2 5.7 5.4 4.8 4.4 4.1 3.9 3.7 3.5 3.3 3.1 3.0 2.8
MOBIUS T-M32 9.0 9.0 8.5 7.7 7.0 6.2 5.9 5.5 5.0 4.8 4.5 4.2 4.0 3.8 3.6 3.5


Takagi Tankless Water Heater Quick Installation Check List
Category Sub-Category Description
Electrical Voltage 120 VAC electrical ground all the way back to electrical service panel
Water Pressure A steady 50 - 60 PSI
Quality Hard water much be treaded with softener or conditioner
Well Water Water pressure must be checked & mineral contents treated
Pipe Material No galvanized supply water pipe
Pressure Relief
Valve
Pressure relief only, no T&P
Recirculation
Line
Recirculation lines should go through a small electric water heater and not directly back through the Takagi tankless water heater
Gas Gas Type Natural Gas or Liquid Propane - Option to specify is available when ordering
Pipe Size Minimum 3/4" I. D. (inside diameter)
Pressure (NG) 7.0 WC (water column) ideally
Pressure (LP) 10.0 WC (water column) ideally
Air Material Exhaust: 4" stainless steel, cat III
Intake: 3" any material - seal connection
Layout 4" exhaust must be individually run per unit all the way to outside
No common venting
No increase or decrease in diameter
Venting Length 25 - 50ft depending on unit - Deduct 5ft for each elbow used in the venting
Condensation Must have condensation drain when linier run exceeds more than 5ft to protect heat exchanger
Combustion
Air Supply
Air supply from outside: 1sq. Inch / 15,000 BTU
Air supply from inside: 1sq. Inch / 1,000 BTU


Takagi Tankless Water Heater Accessory Compatibility Chart
Gas Water Heater Accessories Takagi Tankless Water Heater Models
Description Accessory Part # T-KJr T-K3SP T-K3OS T-K3 T-K3-PRO T-H1 T-M1 T-M32 T-M50
Back Flow
Preventer
TK-BF01 (TK-TV03)    
TM-BF50                
Wall Vent
Terminator (Louver)
TK-KPWL4-1 (TK-TV01)
4.2 - 6" wall thickness
   
TK-KPWL4-2
5.6 - 9" wall thickness
   
TK-KPWL4-3
8.2 - 14" wall thickness
   
Wall Vent
Terminator (Hood)
TK-KPWH4-1
4.2 - 6" wall thickness
   
TK-KPWH4-2
5.6 - 9" wall thickness
   
TK-KPWH4-3
8.2 - 14" wall thickness
   
Outdoor Vent
Cap
TK-TV04          
TM-TV06                
TK-TV08                
TM-VC32                
TM-VC50                
Direct Vent
Kit
TK-TV07                
TK-TV09                
TK-TV10              
TM-TV11                  
TM-DV32                
TM-DV50                
Well Vent
Terminator (Direct Vent)
TK-TV13          
Recess Box TK-RB01            
TK-RB02                
Pipe Cover TK-PC01          
TM-PC32                
TM-PC50                
Multi-Unit Controller
(Includes TM-RE30)
TM-MC01
(RE20 + RE30)
           
Remote Control TK-RE02 (TK-RE01)            
TM-RE30 (TM-RE10)        
Installation Kit
Includes Isolation Valves,
Pressure Relief Valve
TK-IV01      
TM-IV32              
TM-IV50                


How Takagi Tankless Water Heaters Work
Process


Takagi Tankless Water Heater Single Unit Recirculation Example
Recirc Systems


Takagi Tankless Water Heater Multi Unit Recirculation Example
Recirc Systems

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frequently asked questions about Takagi T-K3-PRO tankless water heaters

questions about Takagi Tankless Water Heaters"What type of vent do these tankless water heaters require?"
answers about Takagi Tankless Water Heaters These tankless water heaters require Category III stainless steel vent only.

All Takagi Tankless Water Heaters must be installed by a licensed professional.

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