Takagi TK-340X3-PEH Takagi TK-340X3-PEH Liquid Propane Tankless Water Heater w/ X3 Scale Prevention, Outdoor, 8 GPM

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Takagi TK-340X3-PEH Liquid Propane Tankless Water Heater w/ X3 Scale Prevention, Outdoor, 8 GPM

SKU: 913377
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About the Takagi TK-340X3-PEH

To ensure you get hot water when you want every day, Takagi presents the TK-340X3-PEH tankless water heater that will bring you the most relaxing bathing experience without breaking the bank. You’ll save on monthly bills as it complies with ENERGY STAR requirements and delivers a maximum of 180,000 BTUs at 8 GPM. You get hot water more quickly without spending hundreds of dollars a year. Not only that, the Takagi TK-340X3-PEH tankless water heater has the X3 Scale Prevention Technology that lessens scale-build up. This will extend the life of your water heater three times that of a regular or unprotected water heater and ensure efficiency. With no mineral build-up to clog the pipes, you won't need to do as much maintenance and hot water gets to your showers much faster. 

This water heater uses propane for fuel and has the dimensions of 23-⅝” H x 17-¾” W x 11-¼” D. Its height with the cartridge is 35-9/16”. The hot/cold water connection is ¾” NPT. It's approved for working with an external recirculation pump and cross-over valve. The primary heat exchanger for this water heater is constructed of commercial-grade copper for its high resilience against corrosion and 25x improved heat transmission compared to stainless steel. You'll also get the “Peace of Mind” Limited Warranty which has 15 years warranty for the heat exchanger in residential applications, 5 years for all parts in residential applications, and a year of warranty for the heat exchanger and parts in commercial applications, with no exclusions on hard water and scale-related defects. As an outdoor tankless water heater, the TK-340X3-PEH can save you space and keeps any leaks, noisy operation, or harmful gasses outside of your home. This is especially great for small homes in a warmer climate. 

Takagi always endeavors to bring you longer-lasting water heaters, with significant energy savings but without sacrificing functionality for energy efficiency and space, and this TK-340X3-PEH outdoor tankless water heater is the latest in their efforts. You don't need to wait to get your luxurious and relaxing hot bath or shower, get the best at the most affordable prices here at PlumbersStock! You can also check out our tank water heaters and accessories and parts.

Width: 17-3/4"
Depth: 11-1/4"
Height: 23-5/8"
Product: Water Heater
Flow Rate: 8 GPM
Vent Type: Direct Vent
Manufacturer: Takagi
Connection Size: 3/4"
Electrical Voltage: 120 Volt
Energy Star Rated: Yes
Water Heater Type: Tankless
Installation Location: Outdoor
Modus Operandi: Propane Gas
Mpn # TK-340X3-PEH
Shipping Dimensions 22.0" x 17.0" x 37.0"
Weight 71.00 lbs.
Shipping Dimensional Weight 78.46 lbs.
  • ENERGY STAR QUALIFIED: Equivalent to or better than standard products as it uses less energy. It meets the strict energy efficiency criteria set by the U. S. Department of Energy and ASHRAE 90.1
  • X3 SCALE PREVENTION TECHNOLOGY: No annual descaling is required and no scale buildup means the heater maintains like-new performance longer, three times more than traditional/unprotected models
  • COMMERCIAL-GRADE COPPER HEAT EXCHANGER: Its primary heat exchanger is made of copper so it's more resilient to corrosion. Copper is also 25x better at heat transfer than Stainless Steel, thus stabilizing outgoing water temperatures quicker.
  • RECIRCULATION CAPABLE: Approved to work with an external recirculation pump and cross-over valve
  • ULTRA-LOW NOX REGULATIONS: Complies with Ultra-Low NOx regulations of less than 14 ng/J (
  • FUEL: Condensing liquid propane outdoor model
  • SAFETY FEATURES: Include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • 180,000 MAXIMUM BTUS: minimum of 13,000 and maximum of 180,000
  • MAXIMUM GPM: 8 GPM, based on factory testing; 0.5 GPM for activation and 0.4 GPM required for continuous fire after initial ignition
  • POWER DIRECT VENT DESIGN: Category III or IV venting can be used; the exhaust is 3 PVC up to 70 and 4 PVC up to 100; it provides flexible venting with PVC, CPVC, polypropylene, or ABS Pipe for Intake and Exhaust (solid core only)
  • WARRANTY: 15-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Residential applications


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