Plumbing Service Spartanburg SC | CB Smith Plumbing
Tankless water heater installation in Spartanburg, SC



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Endless hot water, installed correctly. CB Smith Plumbing brings four decades of experience to every tankless installation.
A tankless water heater changes the fundamental dynamic of how a home produces hot water. Instead of storing and constantly reheating a tank of water against the possibility of future demand, a tankless unit heats water on demand as it flows through the system, producing a continuous supply without the standby energy loss that comes with traditional tank storage. For Spartanburg homeowners who are tired of running out of hot water, paying to reheat a tank around the clock, or managing the lifecycle of an aging 40- or 50-gallon unit, tankless installation is a practical upgrade that delivers results from the first day.
CB Smith Plumbing provides tankless water heater installation in Spartanburg, SC for homeowners across Spartanburg, Greenville, and Cherokee Counties. Our technicians assess each home’s hot water demand, gas line capacity, and venting configuration before recommending a unit, and they install what the home actually needs rather than what is easiest to put in. A tankless system that is undersized, improperly vented, or connected to a gas line that cannot supply its BTU requirement will underperform from the first day of use.
Scheduled installations are available, and CB Smith handles the full scope of the job from unit selection through startup and testing.

Why choose CB Smith Plumbing
The tankless water heater installation service Spartanburg homeowners trust
Installing a tankless water heater is a more involved job than swapping out a traditional tank unit. It requires gas line assessment, proper venting, correct unit sizing, and in many cases modifications to the existing plumbing configuration. Here is what CB Smith brings to every tankless installation in Spartanburg.
Proper sizing before any unit is selected
A tankless water heater must be sized to match the home's peak hot water demand, measured in gallons per minute at the required temperature rise. CB Smith assesses the number of fixtures, simultaneous use patterns, and incoming water temperature before recommending a unit. Undersized installations are one of the most common sources of dissatisfaction with tankless systems.
Gas line evaluation included in every installation
Whole-house gas tankless units require significantly more BTU input than traditional tank water heaters. Many Spartanburg homes with original gas line configurations cannot supply a tankless unit adequately without a line upgrade. CB Smith identifies this upfront rather than after installation.
Correct venting for the unit and the installation location
Condensing and non-condensing tankless units have different venting requirements, and the installation location within the home determines which venting configuration is viable. CB Smith installs the venting correctly the first time.
The full job handled by one team
CB Smith manages unit selection guidance, plumbing modifications, gas line work, venting installation, and system startup as a complete installation package. Nothing is left for the homeowner to coordinate with a separate contractor.
282 five-star Google reviews across over four decades in Spartanburg
CB Smith's reputation is built on getting the job right, and a tankless installation that performs correctly from day one is the only outcome we consider acceptable.
Tankless water heater services we provide in Spartanburg, SC
CB Smith Plumbing handles the full range of tankless water heater services for Spartanburg homeowners. Every service below is performed by licensed plumbers with direct experience in residential hot water system installation and service.
Whole-house gas tankless water heater installation
For homes with natural gas or propane supply, a properly sized and installed gas tankless unit provides on-demand hot water for the entire house without the standby losses of a traditional tank. CB Smith installs leading brands including Navien, Rinnai, and Noritz to manufacturer specifications.
Electric tankless water heater installation
For point-of-use applications or homes without gas service, electric tankless units provide on-demand hot water at the fixture level. CB Smith coordinates the installation with the electrical requirements of the unit.
Tankless water heater replacement in Spartanburg, SC
When an existing tankless unit has reached the end of its service life or is performing inadequately, CB Smith removes the old unit and installs a replacement correctly sized to current household demand.
Gas line sizing and upgrade for tankless installation
Whole-house gas tankless units require gas line supply capacity that many existing residential systems were not designed to provide. CB Smith assesses the existing line and performs any necessary upgrades before the unit is installed.
Tankless water heater repair in Spartanburg, SC
Error codes, ignition failures, scale buildup in the heat exchanger, and flow sensor issues are among the most common service needs for tankless units in Spartanburg homes. CB Smith diagnoses and repairs these failures on units of all major brands.
Annual descaling and maintenance service
Hard water mineral scale accumulates in tankless heat exchangers over time and reduces efficiency and flow capacity. CB Smith performs annual descaling and system inspection to maintain tankless unit performance and extend service life.
How CB Smith handles a tankless water heater installation in Spartanburg
You call and describe your hot water situation
When you reach CB Smith Plumbing at (864) 574-4275, tell us about your current water heater, the size of your home, and the symptoms prompting the upgrade or replacement. This information allows us to prepare for the assessment visit with the right approach.
The technician assesses the home's hot water demand and infrastructure
Your plumber evaluates the number of bathrooms and fixtures, the peak simultaneous usage the household experiences, the incoming cold water temperature, the current gas line configuration, and the available venting options. This assessment is the foundation of a correct installation.
A unit recommendation is made before any purchase
Based on the assessment, CB Smith recommends a specific unit size and type that matches the home's actual demand. We explain the recommendation and give you the information you need to understand why that unit is the right choice for your situation.
The installation is completed as a full-scope job
CB Smith handles all plumbing connections, gas line modifications if required, venting installation, and condensate management for condensing units. Nothing is left partially connected or deferred to another visit.
The unit is commissioned and tested under actual load
Once installed, CB Smith runs the system through a startup sequence, confirms ignition, checks the flow rate at multiple fixtures simultaneously, and verifies that the unit is delivering hot water at the correct temperature. Performance is confirmed before the job is closed out.
Maintenance requirements are reviewed with you
Your technician explains the annual maintenance the unit requires, including descaling frequency appropriate to Spartanburg's water quality, and walks you through the unit's error code display and basic user controls before leaving.
What Spartanburg homeowners need to know before choosing a tankless water heater
The decision to install a tankless water heater is the right choice for many Spartanburg homeowners, and a poor experience for others who go into it without accurate information about what the system requires. The gap between those two outcomes is almost always the installation itself rather than the technology.
The most important variable in a tankless installation is sizing. A whole-house tankless unit is rated by its flow rate at a given temperature rise, measured in gallons per minute. A unit that can deliver adequate flow for one bathroom and a kitchen sink may not keep pace with two showers running simultaneously in a larger Spartanburg home. CB Smith calculates the peak demand for each home individually before recommending a unit, because undersizing a tankless system produces exactly the problem the homeowner was trying to solve, running out of hot water, except now the culprit is a unit that cannot keep up rather than a tank that has been depleted.
Gas line capacity is the second variable that determines whether an on-demand water heater installation in Spartanburg performs as expected. A condensing gas tankless unit may require two to three times the BTU input of the traditional tank water heater it is replacing. Many residential gas lines in Spartanburg’s older housing stock, particularly those sized for the original appliance load without anticipating future upgrades, cannot supply that demand without a line upgrade. CB Smith evaluates this during the assessment visit and includes any required gas line work in the installation plan rather than discovering the limitation after the unit is already mounted on the wall.
Spartanburg’s water quality also affects the long-term performance of any tankless unit. Mineral scale from the local water supply accumulates in the heat exchanger over time and reduces both flow capacity and heating efficiency. Annual descaling is the standard maintenance protocol for tankless units in this part of the Upstate, and homeowners who neglect it will see a gradual decline in performance that eventually triggers error codes and premature component failure. CB Smith includes maintenance guidance in every installation handoff so the unit performs at specification for its full expected service life.
What Spartanburg homeowners can expect from a CB Smith tankless installation
Will a tankless water heater truly provide unlimited hot water? A properly sized and installed whole-house tankless unit provides a continuous supply of hot water as long as the flow rate demand does not exceed the unit’s rated capacity. For most Spartanburg households, this means hot water that does not run out under normal usage conditions. It does not mean unlimited simultaneous flow at every fixture in the home, which is why accurate sizing to match peak demand is the most critical step in the installation process.
How long does a tankless water heater installation take? A straightforward replacement of an existing water heater with a tankless unit in a location with adequate gas supply and accessible venting typically takes a full day. Installations that require gas line modifications, new venting runs, or plumbing reconfiguration take longer. CB Smith gives you a realistic timeline during the assessment visit so you can plan accordingly for the day of installation.
What is the best tankless water heater for a Spartanburg home? The correct answer depends on the home’s size, the number of bathrooms, the simultaneous usage patterns of the household, and the available gas line capacity. CB Smith works with leading brands including Navien, Rinnai, and Noritz and recommends the specific model that matches the home’s assessed demand rather than defaulting to a single product line. The best unit is the one that is correctly sized and properly installed for the specific application.
Does CB Smith handle tankless water heater repair on units already installed? Yes. CB Smith performs tankless water heater repair in Spartanburg, SC on units of all major brands, including error code diagnosis, heat exchanger descaling, ignition system repair, flow sensor replacement, and venting inspection. If a tankless unit is underperforming or displaying error codes, CB Smith diagnoses the actual cause before recommending any component replacement.
What maintenance does a tankless unit require in Spartanburg specifically? Annual descaling of the heat exchanger is the most important maintenance task for tankless units in Spartanburg, where mineral content in the water supply contributes to scale accumulation over time. CB Smith also inspects the venting system, checks the inlet filter screen, and verifies ignition and combustion performance during the annual service visit. Consistent annual maintenance is the most reliable way to maintain the unit’s rated performance and maximize its service life.
Is a tankless water heater worth it for an older Spartanburg home? For most Spartanburg homeowners facing a water heater replacement, a properly sized and installed tankless unit is the more practical long-term investment. The upfront cost is higher than a traditional tank replacement, but the elimination of standby heat loss, the longer service life of a well-maintained tankless unit, and the end of hot water running out during high-demand periods make it the right choice for households that plan to stay in the home for several years. CB Smith helps homeowners evaluate the decision honestly based on their specific household profile.
See what others are saying about CB Smith Plumbing
CB Smith Plumbing has built its reputation in Spartanburg one job at a time since 1982. Here is what local homeowners have to say about working with our team.
EXCELLENT Based on 282 reviews Posted on Yonatan YisraELTrustindex verifies that the original source of the review is Google. After over 20 years of doing business with Smith Plumbing who actually plumbed my home when it was built and today was no exception...excellent excellent service as usual. Highly recommended to all.Posted on Crawford WilliamsTrustindex verifies that the original source of the review is Google. Joe is the manPosted on Johnus JeterTrustindex verifies that the original source of the review is Google. Greatly appreciatedPosted on Jason OrickTrustindex verifies that the original source of the review is Google. Mike from CB Smith did a superb job! He communicated my different repair options and was very informative. Will definitely recommend and use again if needed.Posted on Dorothy BlanksTrustindex verifies that the original source of the review is Google. Mike Walsh did an amazing job for us. Very persistent in the face of challenges. Would highly recommend him and CBSmith.Posted on Beth CunninghamTrustindex verifies that the original source of the review is Google. Michael did a geat job. He was knowlegeable and explained the issue thoroughly. Completed the repair promptly and was very professional and courteous. Thank you, David CunninghamPosted on Sharon GoreTrustindex verifies that the original source of the review is Google. I would definitely recommend this company. 5 stars!! Impressed with the call back about my appointment , very pleasant and professional. Joe the tech was quite personable and knowledgeable. I was informed of the issue and was shown pictures before and after . Very satisfied!!Posted on Kristin BrownTrustindex verifies that the original source of the review is Google. CB Smith combines top notch ethics with high quality workmanship. Their employees are honest and hard working and they'll always be the first plumber my family calls.Posted on Larry WadeTrustindex verifies that the original source of the review is Google. They did a great job and I would highly recommend them.Posted on Tracey SwiftTrustindex verifies that the original source of the review is Google. Make CB Smith your plumber. They are great. Unfortunately CB Smith wasn’t available on the weekend so I called another plumber. Bad mistake. After having a bad experience with the other plumber that sent my dog to the hospital, my husband called Joe with CB Smith as we had a great experience with them before. Joe has guided me through a large sewer issue. Mike Welch came over as our toilet was backing up. While not even making much money, he has been responsive to calls and texts. He has provided advice and gave us options that have really helped us save thousands by doing some things ourself. Joe sent Mike Welch over to help us. Mike was able to camera the sewer pipe and let us know exactly where it was. Going out to the street and provide us where he was running into an issue. It is now looking like it’s a water company issue. Even though Joe won’t be making much on this issue, he still says to keep him in the loop. Such an awesome person. Please give Joe, Mike and CB Smith Plumbing your business. You won’t regret it.
Frequently asked questions about tankless water heater installation in Spartanburg, SC
How do I know if my home's gas line can support a tankless water heater?
A whole-house gas tankless unit typically requires significantly more BTU input than the traditional tank water heater it is replacing. Whether your existing gas line can supply that demand depends on the diameter of the line, the length of the run from the meter to the water heater location, and the total BTU load of all other gas appliances the line is serving simultaneously. CB Smith evaluates gas line capacity as part of every tankless installation assessment and includes any required line upgrades in the installation plan before the unit is purchased. Discovering this limitation after the unit is on the wall is avoidable, and CB Smith makes sure it does not happen.
What brands of tankless water heaters does CB Smith install?
CB Smith installs leading tankless water heater brands including Navien, Rinnai, and Noritz. These manufacturers produce condensing and non-condensing units across a range of flow rates and BTU input ratings that cover the full spectrum of Spartanburg residential applications. CB Smith recommends a specific model based on the assessed demand of each home rather than defaulting to a single product. If a homeowner has a strong preference for a particular brand, CB Smith evaluates whether that unit is the correct size for the application before proceeding.
What is the difference between a condensing and non-condensing tankless water heater?
A non-condensing tankless unit exhausts combustion gases at high temperature and requires a metal flue that can handle those temperatures. A condensing unit extracts additional heat from the combustion gases before they are exhausted, achieving higher efficiency and exhausting at a lower temperature that allows the use of PVC venting material. Condensing units cost more upfront but operate more efficiently and offer more venting flexibility. The right choice depends on the installation location, the available venting pathway, and the home’s hot water demand profile. CB Smith explains the distinction during the assessment visit and recommends the type that fits the specific installation.
How hard is it to switch from a traditional tank water heater to a tankless unit?
The mechanical transition from a tank unit to a tankless installation involves more than simply swapping one appliance for another. The gas line capacity must be verified, the venting configuration changes significantly, the plumbing connections may need to be modified, and for condensing units, a condensate drain must be installed. CB Smith handles all of these elements as a complete installation package so the homeowner does not have to coordinate multiple contractors or manage partial installations. The job is done correctly in a single visit with a single team.
Can a tankless water heater be installed in the same location as the old tank unit?
In many Spartanburg homes, yes. Tankless units are significantly smaller than traditional tank water heaters and can often be wall-mounted in the same utility space where the tank was located. The venting pathway and gas line connection point at the existing location are evaluated during the assessment visit to confirm they are compatible with the tankless unit being installed. If the existing location is not viable for the new unit, CB Smith identifies the best alternative location and explains what the relocation involves before any work begins.
How long do tankless water heaters last compared to traditional tank units?
A well-maintained tankless water heater has a longer expected service life than a traditional tank unit in most cases. Tank water heaters in Spartanburg typically reach the end of their reliable service life in eight to twelve years. A tankless unit that receives annual descaling and routine maintenance can remain in service considerably longer. The heat exchanger is the primary component subject to wear, and its longevity is directly tied to the quality of the annual maintenance the unit receives. CB Smith provides annual service for tankless units it installs and for units installed by others.
CB Smith Plumbing is ready to handle your Spartanburg tankless installation.
A tankless water heater installed correctly is one of the most reliable upgrades a Spartanburg homeowner can make to their home's plumbing system. CB Smith Plumbing brings the assessment discipline, the installation experience, and the post-installation support to ensure the system performs the way it is supposed to from the first day and every day after.
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