Plumbing Concepts, Inc
2445 Railroad St.
Corona, CA 92880
Office | (951) 520-8590
Tankless Water Heaters
Find answers to commonly asked questions about tankless water heaters.
Tankless FAQs
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What type of tankless heaters do you sell/install?
Plumbing Concepts has a variety of tankless water heaters available for installation from different manufacturers. All models are either natural gas or propane.
How do tankless water heaters work?
Tankless water heaters work on demand - they only heat water when necessary. When a hot water fixture is opened or hot water is required by an appliance, the heater will sense the demand and heat water accordingly. Tankless water heaters continuously heat the water through a heat exchanger. Instead of wasting energy and money re-heating and storing water when it is not needed, tankless water heaters provide only as much hot water as needed.
How long does a tankless heater last?
Tankless water heaters can last significantly longer than a traditional tank heater. They are extremely reliable as the units are manufactured with the highest quality parts and put through very rigorous testing and quality control. Also, unlike a tank water heater, all parts are replaceable.
Do you have electric only models?
No. Unfortunately we do not offer any electric tankless heater models for homeowners that only have electricity. We only offer natural gas and propane models. Our tankless water heaters are designed for the whole-house, meaning our units can provide enough hot water for an entire home. There are electric tankless water heaters available on the market, but typically a single unit's output is usually not enough for an entire home. Other disadvantages include the large amount of energy consumption that is required to heat the water and it usually takes longer to reach the hot water temperature level at start-up. In areas where there is no gas available, some gas companies do offer gas lines to be installed to your home. We have heard of gas companies in certain areas to offer free gas line installation to homeowners in their service regions.
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How much money can be saved using a tankless heater?
The California Energy Commission estimates that a water heater uses approximately 25% of all energy consumed by any household. Using a tankless water heater will allow a home to use less energy for water heating and cut water heating costs up to half. The key thing to remember is tankless water heaters only use gas for the hot water you use - that's the beauty of the technology.
Which tankless heater is right for my home?
The best way to size a tankless water heater for any application is to estimate the peak flow capacity that will need to be supplied by the water heater at any time. For residential use, this will most likely be the maximum number of showers that may be used simultaneously, multiplied by the flow rate of the showerheads. This calculation should only be done by a qualified plumber or contractor. Once this maximum flow rate is calculated an appropriate tankless water heater can be selected. Plumbing Concepts is happy to provide FREE In Home Estimates to our customers.
Will I get instant hot water with a tankless heater?
No. This is a common misconception of tankless water heaters. A tankless water heater DOES heat water on-demand instantly, but just like a tank water heater, it will take the same amount of time for the hot water to travel through the plumbing inside your home. If you would like to get instant hot water, there are recirculation pump systems available to hook-up to your water heater. Please ask your installer to see what options you may have in getting instant hot water in your home.

Note: If a recirculation pump is used, we recommend an on-demand system, such as ACT/Metlund® Hot Water D'MAND® and the Taco D’MAND versus a aquastat/timer in order to keep the full warranty coverage.
Do I need to upgrade my gas line?
Maybe. Tankless water heaters do need a larger gas line since its required BTUs are higher than tank water heaters. The reason why the BTUs are higher is because it needs the energy to heat the water to your set temperature in mere seconds. The actual gas line upgrade size will be depend on which tankless model you choose and the distance from the gas meter. However, the minimum gas line size is 3/4".
Why does my tankless heater also need electric power?
 The tankless heaters only come in gas models (natural gas or propane) to heat the water, but electricity is required for the digital remote and to power the PC board, which is the brain of the heater. Also since there is no stand-by pilot light, it uses an electric direct ignition. Electricity consumption is very minimal. The heaters electric power requirement is 120V AC, which is the standard power outlet in US homes.
Can my existing venting be used with a new tankless heater?
 No. By code, tankless water heaters must use Category III stainless steel venting. Category III venting is corrosion resistant and gas tight. The venting must be corrosion resistant because a slightly acidic condensate is formed during combustion. This condensation can eat away at your current vent pipe’s galvanized metal and cause major damage to your tankless water heater's internal components. More importantly, the venting must be gas tight to avoid carbon dioxide leakage. Tankless heaters use a powered exhaust fan to push gas out, as opposed to tank water heaters which use natural draft.

Note: Schedule 40 PVC or CPVC can be used for venting on our condensing technology tankless heaters only.
Do I need to install a water softener with my tankless heater?
No. It is not required to install a water softener, but if you do live in an area that has very hard water it will eventually harm the performance of your tankless water heater. Some things you can do is to add a water treatment system such as a ScaleShield which prevents scale from forming inside the heater's copper piping, a whole-house water softener system, or do a routine flush maintenance (frequency depends on your water hardness level).

It is recommended to have your installer test your water hardness or contact your city's water department for the water test report. Water hardness levels in excess of 12 grains per gallon entering the heater will significantly affect its performance and void your warranty.