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Top-Rated Tankless water heater installers in South Lancaster - Updated Nov 2026

Avatar for D Day Plumbing
D Day Plumbing
5.0(
46
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"I'm a deep value oriented consumer and this guy is one of the best contractors I've come across for the money. Why would you want to pay for the administrative and marketing costs which comes with the fees charged by the big box guys. D-Day is a true professional and a master craftsman at his work. I've hired him to replace a water heater, install a dishwasher and washing machine, as well as miscellaneous plumbing repairs with exemplary results. I wouldn't even consider looking elsewhere."
Cabinet - finished product
Cabinet rebuild (before picture)
Gas Hot Water Heater Install - Power Vented
Navien Wall Hung Water Heater
3 Bay Commercial Sink Install

+32

Response time2 hrs
Recommended by100%of homeowners
Avatar for Domination Plumbing and Heating
Domination Plumbing and Heating
4.6(
23
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"First off, the consult was great. I was able to add services to my initial request and received a deal doing so. I also added a second set of services later that month. Adam and Steve completed the work and were completely professional and super efficient. They answered my questions and made sure I understood the work being performed. They worked with my schedule and were fantastic. I had a gas hook-up for a change from electric stove to gas stove - they even took care of the permits and inspection. They removed an old water access point for the fridge's icemaker that was in an awkward spot. They also added a regulator for the water pressure and water filtration system. Fantastic work all around. Should we need any more plumbing/gas work, I would definitely hire them again."
Custom Work
Custom Work
Custom Work
Custom Work
Custom Work

+20

Response time4 hrs
Response rate96%
13 neighbors recently requested a quote
Avatar for Advanced Energy Concepts of Worcester, Inc.
Advanced Energy Concepts of Worcester, Inc.
3.8(
140
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"I called them for a basic service the day after Snomagedon2015 fully expecting not to get anyone out for at least a few days. Someone was at my door within 3hrs! Answers all my silly questions, provided helpful information and advice and cleaned up when he was done. Will definitely be calling them back for future service and installation when the time comes!"
Response time3 days
Response rate85%
33 neighbors recently requested a quote
Avatar for DL Plumbing and Heating
DL Plumbing and Heating
5.0(
5
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Warranties offered

"We have used Dave as our plumber multiple times. Some projects were tankless water heater install and servicing, bathroom remodel , also he did all the plumbing for our addition including kitchen/laundry/ bath. Always reliable with good communication. Will continue to use Dave!"
Smart Leak Detection
Driveway Heating
Water Heating System
Heating Systems
Radiant Floor Heat

+4

Response time1 day
Avatar for Morton Plumbing and Heating
Morton Plumbing and Heating
5.0(
5
)
Tankless Water Heater - Install

Serving South Lancaster, MA and surrounding areas

Approved

In business since 1985

Free estimates

Credit card accepted

"Morton’s Plumbing & Heating did an excellent job replacing my bathroom vanity and sink. I would recommend them to anyone looking for a great honest plumber who is reasonably priced compared to these big corporations."
1 neighbors recently requested a quote
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