• Takagi Tankless Water Heater with Direct Vent Kit TK-TV10, Remote Control and Pressure Relief Valve - Natural Gas - T-K4-IN NG Kit 2

    - 190,000 Btu - Indoor Installation

    Product ID • TK3NGKT03001

  • $819.75
  • Quantity:
  • Free Ground Shipping


T-K4-IN is a mid-sized water heater in the Takagi tankless line. But these small, but powerful unit - with gas inputs up to 190,000 BTU per hour - can meet all the hot-water needs of your home or apartment with one or two bathrooms. The T-K-4-In has an energy factor of 0.81-0.83. The All new T-K4 has a max GPM of 8.0 GPM.

Cost-efficient and environmentally friendly, the T-K4-IN can be converted into a direct-vent unit by using the optional TK-TV10 conversion kit for installation in a garage, a utility closet or any confined space in which makeup air may be limited.

For Outdoor Installions in moderate temperature climates - use the Takagi T-K4-OS Outdoor Model.

The four preset temperatures on the unit are: 113°F, 122°F, 131°F, 140°F. To achieve any temperatures other than those presets, your client will require the TK-RE02 temperature controller.

Kit 2 Includes : Cash Acme Commercial Pressure Relief Valve - 14737-0150 & Takagi TK-TV10 Direct Venting Kit

The Cash Acme FWL-2 is a pressure only relief valve designed specifically for the protection of tankless hot water supply systems where over-pressure conditions are likely to occur as a result of thermal expansion.

Completely automatic, the FWL-2 reseats after pressure relief. The valve may be installed directly on the tank or in a tee and is appropriate for either side (hot or cold) of the water heater.

The TK-TV10 direct vent conversion kit can be used to convert the tankless hot water unit from a conventional vent system to a direct vent (or sealed combustion) system.

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Technical Specs

Takagi T-K4-IN Tankless Water Heaters Specs

  • Power Input
    Natural Gas 11,000-190,000 BTU
  • Propane Gas
    11,000-190,000 BTU
  • Water Pressure Minimum
    15 PSI
  • Maximum
    150 PSI
  • Gas Connection (Min)
    3/4 Inch Male NPT
  • Water Connection
    3/4 Inch Male NPT
  • Natural Manifold Pressure
    2 to 2.5 Inch W.C.
  • Propane Gas Manifold Pressure
    3.7 to 4.0 Inch W.C.
  • Electrical Supply
    120 Volts
  • Weight
    38 lbs
  • Height
    20.5 inches
  • Width
    13.8 inches
  • Depth
    8.5 inches
  • Maximun Water Flow
    8.0 GPM
  • Minimum Flow to Activate
    .5 GPM
  • Flow Rates (50 degree Input Water Assumed)
    90°F rise / 3.5 gallons per minute
  • Flow Rates (50 degree Input Water Assumed)
    80°F rise / 3.9 gallons per minute
  • Flow Rates (50 degree Input Water Assumed)
    70°F rise / 4.4 gallons per minute
  • Flow Rates (50 degree Input Water Assumed)
    60°F rise / 5.2 gallons per minute
  • Flow Rates (50 degree Input Water Assumed)
    55°F rise / 5.7 gallons per minute
  • Flow Rates (50 degree Input Water Assumed)
    50°F rise / 6.2 gallons per minute
  • Flow Rates (50 degree Input Water Assumed)
    40°F rise / 6.7 gallons per minute
  • Temperature Settings without remote controller
    113°, 122°, 131° and 140°
  • Temperature Settings with Temperature Remote Controller TK- RE02
    99°, 100°, 102°, 104°, 106°, 108°, 109°, 111°, 113°, 115°, 117°, 122°, 131°, 140°, 158° and 167°
  • Exhaust Vent Size
    4 Inches Sealed Stainless Steel CAT III Vent Pipe (50 feet max length subtract 5 feet each 90 degree elbow with a maximun 5 elbows)
  • Intake Vent Size (optional)
    3 Inch Piping
  • Ignition
    Electronic Ignition
  • Backflow Preventer
    TK-BF01 Required in weather condtions below 36 F degrees
  • Vertical Condensation Drain
    Install per local code

Cash Acme Commercial Pressure Relief Valve - 14737-0150

  • Specifically for the protection of hot water supply systems
  • 150 PSI
  • Compact and economical
  • Maximum temperature 210°F (hot water)
  • Every valve is tested for performance prior to shipping

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