Replacing a failing heater
You are considering tankless while replacing an older tank or tankless unit.
Tankless Water Heater Installation
A tankless installation should fit the home—not just the wall.
Reliable tankless performance depends on sizing, household demand, fuel or electrical capacity, venting, water connections, and a serviceable location. Duckett helps homeowners across the Upstate plan the complete installation.
Replacing a failed hot-water system? Call Duckett to discuss the current setup.
Plan the unit and every connection around it.Across Upstate South Carolina
LocalFamily-owned & operated
25+Years combined experience
24/7Emergency plumbing service
ClearStraightforward pricing
★★★★★
“Will and Nate was very amazing ! They did a great job I definitely recommend them. Very good people and did a very good job.”
Lataviana OutingGoogle Reviewer · 5 months ago★★★★★
“Nate was super respectful and helpful on fixing our pressure reducing valve. Would recommend him to do future jobs.”
Karla KiddGoogle Reviewer · 5 months ago★★★★★
“Great work! 10/10 recommended. They came in, respectful, did the job in a timely manner, extremely fair priced, cleaned up the site and was out of our hair in great time. Thankful for my new well setup!”
★★★★★
“Will and Nate were.so knowledgeable and quickly assessed and diagnosed our issue with our water pressure. In addition, they provided helpful advice for troubleshooting should future issues surface. They were timely and professional and the prices were reasonable. We will call on them for future services.”
★★★★★
“These guys are awesome. I called and they were on it the next day. We had a water line installed from home down to dock, had a sewer leak, a toilet running, a hot water heater installed and low water pressure. They repaired everything. All the employees were so kind and done more that what they were supposed to do. I highly recommend this company to do a great job.”
★★★★★
“Nate an Kevin came out last month and did an amazing job replacing my well setup. They was here fairly quick and got the job done same day. Definitely recommend them for any an all plumbing aspects.”
★★★★★
“Called for someone to come out to take a look at leak under my sidewalk next to my house/front door. Two gentleman came out on time, quickly diagnosed the problem, and gave me information about the fix.”
★★★★★
“Service was great! The plumber was extremely helpful and courteous. He fixed my issue quickly and was very respectful of my time constraints with another appointment. I appreciate the help!”
Review 1 of 8: Lataviana Outing
Recognize the change
When tankless installation planning makes sense.
A new build, failing heater, renovation, or changing hot-water demand can start the conversation—but site conditions shape the answer.
Planning a renovation
Hot-water demand or the mechanical area is changing.
Freeing floor space
A wall-mounted system is being considered for a constrained utility area.
Reviewing household demand
You want equipment sized around how the home actually uses hot water.
Current heater has failed? Call Duckett.
(864) 209-9360Tell us what is installed now and whether the existing unit is leaking.
What we can help with
Plan the demand.
Plan the utilities and venting.
A successful installation begins with the home’s requirements and available infrastructure, not with choosing equipment in isolation.
Demand and sizing review
Consider simultaneous fixture use and incoming water conditions.
Fuel or power requirements
Review the available energy source and capacity for the proposed equipment.
Venting and combustion air
Plan applicable venting paths and manufacturer-required clearances.
Water and condensate
Account for water connections, service valves, drainage, and condensate where required.
Serviceable placement
Choose a practical location with appropriate access for future maintenance.
Installation is a system
Equipment selection follows
site and demand planning.
Household use, incoming water, utilities, venting, drainage, and location all shape the appropriate installation.
The installed equipment
A complete view makes clear how the heater connects to the home.
Future service access
Placement and valve access matter after installation day.
What to expect
Plan first. Install to the actual conditions.
Describe the hot-water problem
Tell us what the system is doing, when it started, and whether you have seen water around the unit.
Assess the system
A technician reviews demand, location, utilities, venting, and connection requirements before presenting installation options.
Review the next step
Understand the proposed work and pricing before deciding how to move forward.
Common related problems
Tankless installation
raises practical questions.
The answers depend on the home, current equipment, and the proposed installation location.
Talk to Duckett
How should the unit be sized?
Sizing should consider simultaneous demand and the temperature rise the unit must provide.
Is the gas supply adequate?
Gas-fired systems may require review of the available fuel supply and piping capacity.
What electrical work is involved?
Power requirements vary by system and must be considered in the installation plan.
Where will it vent?
Applicable venting must follow equipment and site requirements.
How is condensate handled?
Condensing equipment needs an appropriate condensate path and related considerations.
Can it replace a tank heater?
A conversion may be possible, but the home’s utilities, demand, space, and scope determine suitability.
Why Duckett
Local people.
Straightforward help.
Duckett is family-owned and operated, with more than 25 years of combined plumbing experience. The team treats tankless installation as a whole-home planning decision and explains the scope before work begins.
Family-owned & operatedStraightforward pricing24/7 emergency plumbing
Request Service Google Reviews
Customer reviews
What customers remember.
Verified customer feedback from Duckett Plumbing’s published website and supplied Google Business Profile material.
★★★★★
“Will and Nate was very amazing ! They did a great job I definitely recommend them. Very good people and did a very good job.”
Lataviana OutingGoogle Reviewer · 5 months ago★★★★★
“Nate was super respectful and helpful on fixing our pressure reducing valve. Would recommend him to do future jobs.”
Karla KiddGoogle Reviewer · 5 months ago★★★★★
“Great work! 10/10 recommended. They came in, respectful, did the job in a timely manner, extremely fair priced, cleaned up the site and was out of our hair in great time. Thankful for my new well setup!”
★★★★★
“Will and Nate were.so knowledgeable and quickly assessed and diagnosed our issue with our water pressure. In addition, they provided helpful advice for troubleshooting should future issues surface. They were timely and professional and the prices were reasonable. We will call on them for future services.”
★★★★★
“These guys are awesome. I called and they were on it the next day. We had a water line installed from home down to dock, had a sewer leak, a toilet running, a hot water heater installed and low water pressure. They repaired everything. All the employees were so kind and done more that what they were supposed to do. I highly recommend this company to do a great job.”
★★★★★
“Nate an Kevin came out last month and did an amazing job replacing my well setup. They was here fairly quick and got the job done same day. Definitely recommend them for any an all plumbing aspects.”
★★★★★
“Called for someone to come out to take a look at leak under my sidewalk next to my house/front door. Two gentleman came out on time, quickly diagnosed the problem, and gave me information about the fix.”
★★★★★
“Service was great! The plumber was extremely helpful and courteous. He fixed my issue quickly and was very respectful of my time constraints with another appointment. I appreciate the help!”
Review 1 of 8: Lataviana Outing
Areas we cover
Based in Greenville. Working across the Upstate.
Based in Greenville, Duckett serves homeowners across a wide network of Upstate South Carolina communities.
Check availability by phoneGreenville
Anderson
Easley
Greer
Mauldin
Seneca
Taylors
Simpsonville
Spartanburg
Laurens
Greenwood
Clemson
Tankless Water Heater Installation
Tell us about the current hot-water setup.
Share whether this is a replacement, upgrade, renovation, or new installation, plus the existing heater type if known.
Call Duckett(864) 209-9360