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Tankless Water Heaters

You won't find a better selection of tankless water heaters anywhere on the Internet. Let PlumbingSupply.com® be your source for tankless water heaters and thousands of other plumbing-related products!

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Point-of-Use Tankless & Mini-Tank Water Heaters

Small Tankless Water Heaters

Mini-Tank Water Heaters

Residential Tankless Water Heaters

Takagi Gas Tankless Water Heaters

Takagi is an industry leader with a name and product you can rely on for years to come. From their smallest T-Kjr (TK Junior) single unit to their large T-D2 unit that can be Multi-Linked, you are sure to find a tankless water heater to meet your needs. Try one and you'll see why Takagi offers some of the most durable and best quality tankless water heaters on the market today!

For Indoor Installations

For Outdoor Installations

Looking for Takagi T-vent stainless steel venting? We've got it right here!

Noritz Gas Tankless Water Heaters

Noritz does not compromise on comfort or safety! Noritz tankless hot water heaters heat water efficiently and flow rate performance is maximized by their dual flame burner technology. A second row of burners burns the escaped gas from the first row of burners causing an increased level of efficiency helping to stabilize temperature fluctuations. Noritz designs and manufacturers their heat exchangers from raw copper using 25% thicker commercial grade copper piping resulting in a dependable and superior quality product.


Looking for Noritz stainless steel gas venting? We've got it right here!

Bosch Gas & Electric Tankless Water Heaters

Bosch offers peace-of-mind by using smart, energy saving on-demand tankless water heating technology. Bosch is known for their quality products and their tankless water heaters are no exception. Bosch point of use heaters have a solid copper heat exchanger, copper-sheathed elements and a tough plastic exterior housing. When homeowners want an endless supply of hot water, but don't wish to constantly heat water they aren't ready to use, then a gas tankless water heater may just be the answer.

Eemax Electric Tankless Water Heaters

Eemax offers a terrific selection of Electric tankless water heaters, one for almost every residential or commercial situation you will encounter. When you want a durable water heater you know you can depend on, you will want to own one of these units. Eemax has been making tankless water heaters since 1988. Their willingness to provide increased product configurations to serve the different temperate zones found all around this country has established them as a leader in the tankless water heater industry.

Commercial Tankless Water Heaters

Whatever your application, we've got the tankless water heater your business needs. From eyewash heaters that provide tepid water temperatures to encourage flushing eyes for the full time needed to specialty heaters that won't contaminate pure de-ionized water for chemical manufacturing or ultrasonic cleaning, and everything in between, you're sure to be pleased with the quality and performance of these commercial tankless water heaters.

Tankless Water Heater Parts & Accessories

Whether you need venting or connectors, are required to use isolation valves for code, or want to repair your old tankless water heater or mini-tank water heater - we've got everything you'll need right here. We offer plenty of parts and accessories to help you get a new tankless water heater all set up or to get your existing system running like new again.

Please note: For potential safety reasons, we do not recommend using PVC to vent gas tankless water heaters. For the best results, we recommend using Category 3 stainless steel gas vent pipe for all gas tankless water heaters.

Related Items & Information

Frequently Asked Questions

Q. "Will an instantaneous water heater save me money on my utility bills?"
A. In many applications you can see a savings. There are some variables that could reduce the amount you save. One example is you will not run out of hot water, so longer showers could cut into your savings. Also, the cost of electricity, propane and natural gas in your area will affect the amount of money saved. The higher the cost for the energy type used to heat your water, the quicker you can recover the higher initial cost of installing a tankless versus tank style water heater.

Positives:
  • You will never run out of hot water. "You want an hour long shower? No problem!"
  • Electric units can be installed at the point of use.
  • You're not paying energy costs to heat water 24 hours a day.
  • Our electric units don't require a T&P valve (no tank!) - if code allows.
  • Installing a tankless water heater can indeed be a bonus to the environment. (Why choose wastefulness when we're talking about finite natural resources?)
Negatives:
  • They all need a minimum flow rate & pressure to turn on.
  • Electric units need heavy gauge wire, while gas units need a much larger, special flue pipe and larger gas supply than a conventional water heater.
  • At times they can produce very hot water. It's easier to get scalded - but this is easily mitigated with anti-scald valves.
  • With some brands, parts are hard to find (not a negative if you originally purchase from us, as we like to carry parts for the units that we sell).
Summary:
Tankless water heaters have their place. They're not "the answer" to every hot water need, but if they're used correctly they can be the solution to many of them.

Q. "If these units don't have a tank, how do they know when to turn on?"
A. The tankless water heaters have a flow switch built into them. When you turn on (open) the hot side of a faucet the water then moves (travels). Once the water is traveling at 3/4 of a gallon per minute or faster most tankless water heater switches will then turn on the gas or electricity.

Q. "What's the difference between a conventional flue and a direct vent?"
A. A conventional flue is what most people are familiar with. It typically consists of a double-wall flue pipe going from the top of the heater through the roof, venting outside. The fixture draws its combustion air from the space around it (utility room, garage, hallway, etc.). A direct-vent unit on the other hand, both vents and draws its combustion air through a specially designed pipe from the outside via an adjacent wall.

Q. "On the electric tankless models; why should I buy the thermostatic model instead of the lower priced flow model?"
A. The thermostatic model has a number of advantages. A non-thermostatically controlled model's outlet temperature is dependent on the flow rate, and it can create a potential problem with anti-scalding valves and the like. When in doubt, please order the thermostatically controlled models. Also, the thermostatic models can have a warm or hot water source, but the non thermostatically controlled models are only designed for a cold-water source/input.

Q. "I would like to convert my natural gas tankless heater to be able to use LPG (propane) gas instead. Do you offer a conversion kit?"
A. Sorry, but we don't. Even if we could, we probably wouldn't, as in most cases it is not a good idea to convert one type of gas for another. Burners can be different, orifices, etc. Not only is the BTU rating different for these two gases, but also the heat of the flames and a number of other factors. We simply do not wish to sell something that might create a non-safe environment.

Q. "Can I install tankless water heaters in my attic?"
A. Without seeing all of your plumbing piping, etc. it is difficult for us to answer with a straight "yes" or "no." One must be sure that a possible water siphoning condition can not be created as tankless water heaters should not have air in the lines. Water siphoning out of any brand of tankless water heater might damage the heater when there is no water (or not enough water) in the lines.

Q. "Is it possible to drain a tankless water heater to prevent freeze damage when not in use?"
A. Yes, on most brands (best to check first though with the manufacturer). Simply drain both lines 'to' and 'from' the unit. As long as there are no check valves in the way, that should drain the water from the unit. To guarantee that there is no water in the unit, we recommend two drain valves - one before and one after the unit - as well as blowing air through the water line.

Q. "Your products specify the 'temp. rise' based on the GPM flow; what do you mean by this?"
A. Temperature rise is the amount the heater raises the temperature of the incoming water, based on the flow rate shown of that water.

Q. "Can I replace my existing tank type water heater with a tankless water heater?"
A. Yes, but there are specific requirements that will need to be addressed. Gas units will require a larger, special vent pipe and a larger gas supply line that not only will supply the water heater, but all other appliances on that gas pipe run. Electric units will require larger gauge wire and breakers than most tank type water heaters.


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