Takagi T-K4-IN-LP 8.0 GPM Liquid Propane Indoor Tankless Water Heater from the Tankless Collection

- Item #: BCI1880930

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This product has additional required/recommended options. To configure, add to your cart.

  • Pipe Cover Recommended
  • Direct Vent Recommended

8.0 GPM Liquid Propane Indoor Tankless Water Heater

The all new T-K4 models have an impressive max GPM of 8.0GPM! Cost-efficient and environmentally friendly, the T-K4-IN can be installed indoor with an optional Direct Vent kit. This tankless water heater is a powerful unit with gas inputs up to 190,000 BTU per hour.


  • Capacity 2-3 Showers (Depending on climate)
  • Gas Fired Tankless Water Heater
  • Indoor Installation Only
  • Safety Features: Air-Fuel Ratio Sensor (AFR), Exhaust and Water Temperature Safety Control, and Overheat Cutoff Fuse
  • Internal Freeze Protection System
  • Manual reset switch


  • Min 11,000 BTU/h
  • Max 190,000 BTU/h
  • Energy Factor - 0.82
  • Hot/Cold/Gas Connection - 3/4" NPT
  • Dimensions - H 20.3" x W 13.8" x D 8.5"
  • Weight - 38 lbs
  • Clearance- Top: 12", Bottom: 12", Front: 24", Back: 1", Sides: 2 "


  • Horizontal or Vertical Insallation
  • Electric Ignition
  • Power Vent
  • Flue 4" O.D.-Category Stainless Steel
  • Intake 3" O.D.(ABS, PVC, Galvanized Steel, Corrugated Stainless Steel  or Category III/IV Stainless Steel)
  • 50' Max Length, 5 Elbow max (90 degree Elbow = 5' length)


  • 9007996005 - Backflow Prevention and F-F adapter
  • 9007667005 - Direct Conversion Kit
  • 9007671005 - Pipe Cover
  • 9007666005 - Temperature Remote Controller (Included)
  • 9008004005 - Sidewall Vent Terminator (Hood) and Wall Thimble (4"-7")
  • 9007674005 - Recess Box
  • 9007605005 - Isolation Valves and Pressure Relief Valve

Additional Takagi Links

Our SKU: Takagi T-K4-IN-LP

This product is listed under the following manufacturer number(s):

  • Takagi TK4INLP

*Denotes a finish or option that has been discontinued

Takagi T-K4-IN-LP Product Specifications

Specification Sheet
Approved for Commercial Use Yes
Configuration Tankless Water Heater
Default Temperature 122
Depth 8.5
Direct Vent No
Fuel Type Liquid Propane
Gas Connection 3/4"
Height 20.3
Ignition Type Electronic
Indoor Installation Yes
Liquid Propane Pressure (Max) 14.0 WC
Liquid Propane Pressure (Min) 8.0 WC
Low Lead Compliant Yes
Maximum Elbows 5
Maximum Gas Input 190000
Minimum Gas Input 11000
NG Energy Factor .82
Outdoor Installation No
Power Supply AC 120V
Product Weight 38
Temperature (Max) 167
Temperature (Min) 99
Water Pressure (Max) 150
Water Pressure (Min) 15
Width 13.8

Installation Resource Center

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