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T-K3OS Tankless Water Heater by Takagi

more Takagi Tankless water heaters - accessories for Takagi tankless water heaters
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Flash Takagi TK3-OS Tankless Water Heater - For OUTDOOR Installations
Fully modulating gas fired tankless on demand water heater. Designed to supply hot water to: domestic hot water systems (direct and indirect using water storage tank applications) with or without recirculation system, piping, hydronic heating systems, radiant floor heating, and combined domestic water and heating water systems. Note: The T-K3-OS does not require any additional Category III venting or vent caps, making installation one step easier for its installers.
 
The Takagi T-K3-OS on-demand water heater features:
  • This unique tankless water heater is designed for outdoor installations
  • Efficient tankless water heater provides you hot water when you need it and doesn't waste energy when you don't
  • Built in freeze protection - to make your tankless water heater more durable
  • Overheat cut off fuse
  • Inlet/outlet thermistors for constant temperature monitoring
  • Flame sensor

Outdoor Tankless Water Heater Specifications:
  • Flow rate: 0.5-7GPM
  • Four temperature settings with dip switch (included): 113°F, 122°F (default), 140°F, 167°F
  • Water pressure min: 15 psi max: 150 psi
  • Natural gas pressure inlet: min: 5" WC max: 10.5" WC
  • Gas input (NG & LP models): min: 11,000 BTU max: 190,000 BTU
  • Gas connection: 3/4" NPT
  • Water connections: 3/4" NPT
  • LP gas pressure inlet: min: 8 " WC max: 13.5" WC
  • Manifold pressure: natural gas 2.8 " WC propane 3.1 " WC
  • Amps: .67
  • Weight: 40 lbs.
  • Ignition: electronic ignition
  • Electrical supply: AC 120 V
  • Click here for dimensions
Takagi T-K3-OS Tankless Water Heater
Takagi T-K3-OS
tankless water heater
for outdoor installations
We cannot show pricing on the web for these items. To request a price quote, select the items you are interested in by clicking the box in the "Select Item(s)" column next to the product. Click the button below the accessories to add items to your quote list.
Model # Description Fuel Type Select Item
TK3-OS-LP Flash Takagi T-K3-OS Tankless Water Heater Propane
TK3-OS-NG Flash Takagi T-K3-OS Tankless Water Heater Natural Gas
 
Takagi T-K3-OS Accessories
Model # Description Select Item
TK-RE02 Temperature Controller Remote
TK-RB02 Recess Box (Click for installation information)
TK-PC01 Pipe Cover
 
Pressure Relief Valves
A pressure relief valve is required for all tankless water heaters. In some areas, a temperature and pressure relief valve is required. Check your local plumbing code for more information.
Pressure Relief Valve - Brass - 3/4" - 150 PSI
Temperature and Pressure Relief Valve - up to 200,000 BTU
 
Isolation Valves
Complete inlet/outlet valve system that provides everything you need for a secure installation including full port testing and flushing of the system with easy to install union connections.
Isolation Valve - Set (Hot & Cold) 3/4" IPS Union x 3/4" IPS
Isolation Valve - Set (Hot & Cold) 3/4" IPS Union x 3/4" Sweat
 
Gas Connectors
Stainless Gasflex - 1" OD (3/4" ID) x 24" - with adapter to 3/4" FIP x 3/4" MIP
Gas Ball Valve 3/4"
 
Hot Water Heater Scale Inhibitor System
Features: inhibits scale build-up, helps protect piping from corrosion, maintains efficiency & extends life of system, 3/4" NPT, 6 GPM, cold water feed line, made from FDA CFR-21 compliant materials, suitable for drinking and cooking water and all food applications, and effective on all types of hot water systems-boilers, tankless, and tank-type (gas or electric). Replacement cartridges (AP431) are available for these in-line scale inhibitor systems.
Hot Water Heater Scale Inhibitor System
Replacement filter for hot water heater scale inhibitor system
Note: Recommended time to change/replace filter cartridge is 6 months.
Purchase a replacement cartridge to have on hand when needed.

We cannot show pricing on the web for these items.
To request a price quote, select the items you are interested in by clicking
the box in the "Select Item(s)" column next to the product.
Click the button below to add items to your quote list.



Frequently asked questions about Takagi TK3-OS (T-K3OS) tankless water heater

questions about Takagi TK3-OS (T-K3OS) tankless water heater"How does the freeze protection system work?"
answers about Takagi TK3-OS (T-K3OS) tankless water heaterThis water heater comes equipped with heating blocks to prevent freezing which can damage the heat exchanger. The freeze protection system will activate when the temperature drops below 36.5°F (2.5°C) and is rated to protect the unit down to 5°F (-15°C) in a wind-free environment.

questions about Takagi TK3-OS (T-K3OS) tankless water heater"Is this rated for indoor use?"
answers about Takagi TK3-OS (T-K3OS) tankless water heater No, this tankless water heater is rated for outdoor use only.

questions about Takagi TK3-OS (T-K3OS) tankless water heater"How much clearance do I need around my tankless water heater?"
answers about Takagi TK3-OS (T-K3OS) tankless water heater This water heater needs 2" of clearance on each side, 12" on bottom, 36" on top, 1" on back, and 24" in the front. Click here for installation clearance diagram.

questions about Takagi TK3-OS (T-K3OS) tankless water heater"What is a thermistor?"
answers about Takagi TK3-OS (T-K3OS) tankless water heater A thermistor is a type of resistor that is used to measure change in temperature. It relies on the change in its resistance with changing temperature.

questions about Takagi TK3-OS (T-K3OS) tankless water heater"How does the manual reset high limit system work and why is it needed?"
answers about Takagi TK3-OS (T-K3OS) tankless water heaterHard water can cause build up in the water heater over time. This manual reset hi limit system is designed to turn off the water heater (to prevent damage to the heater) if there is too much build up in the system. If your water is too hard it may be helpful to use a water softener. It's activated at 194°F and the hot water can be turned back on after the manual reset hi limit has turned it off.


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