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Avatar for Tankless Concepts

Tankless Concepts

4.99(
117
)

Tankless Concepts

4.99(
117
)
Customers say: Super punctual
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We specialize in the installation and servicing of Rinnai and Navien tankless water heaters and boilers. We are proud to be recognized by Rinnai as the Top Dealer/Installer in Maryland, Virginia and Washington DC. We have earned Rinnai's "Advanced Comfort Expert (ACE)" status. We are also proud to be an authorized dealer / service provider for Navien. We are a nine-time recipient of the Angie's List esteemed Super Service Award and have been featured in their Super Service Spotlight and in Advice from Angie's List by Angie Hicks. We have over 25 years of gas experience and have been installing and servicing tankless water heaters since September of 2004. We offer in-home consultations and provide professional estimates within 24-48 hours of consultation. We stand behind our installations with a two-year (2-year) warranty on workmanship and materials and we provide maintenance and repair service for every appliance that we install.

"So glad we found this company! We had a few estimates and Tankless Concepts was by far the most knowledgeable and professional with reasonable prices. They were able to explain every aspect of the job to get the correct system and installation for our home. When it came time to install the team was super friendly and helpful and they were able to make on-site adjustments to help us get everything just right. We are very happy with how things turned out and would absolutely recommend for anyone considering having a tankless water heater."

Andy T on June 2024

We specialize in the installation and servicing of Rinnai and Navien tankless water heaters and boilers. We are proud to be recognized by Rinnai as the Top Dealer/Installer in Maryland, Virginia and Washington DC. We have earned Rinnai's "Advanced Comfort Expert (ACE)" status. We are also proud to be an authorized dealer / service provider for Navien. We are a nine-time recipient of the Angie's List esteemed Super Service Award and have been featured in their Super Service Spotlight and in Advice from Angie's List by Angie Hicks. We have over 25 years of gas experience and have been installing and servicing tankless water heaters since September of 2004. We offer in-home consultations and provide professional estimates within 24-48 hours of consultation. We stand behind our installations with a two-year (2-year) warranty on workmanship and materials and we provide maintenance and repair service for every appliance that we install.

"So glad we found this company! We had a few estimates and Tankless Concepts was by far the most knowledgeable and professional with reasonable prices. They were able to explain every aspect of the job to get the correct system and installation for our home. When it came time to install the team was super friendly and helpful and they were able to make on-site adjustments to help us get everything just right. We are very happy with how things turned out and would absolutely recommend for anyone considering having a tankless water heater."

Andy T on June 2024


Avatar for 4 Service Pros

4 Service Pros

4.85(
1,679
)

4 Service Pros

4.85(
1,679
)
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

4 Service Pros has 4 separate divisions. Each Professional we employ only works in the trade they are licensed in. Electrical, Plumbing, HVAC and Remodeling services... Based in Northern Virginia & serving customers throughout the metro area. We do everything from new installations and repairs to preventative maintenance. Our company welcomes jobs of all sizes. We have extensive experience working with countless residential and commercial customers in Northern Virginia and surrounding areas. Whether you need a leak fixed or complete rewiring, we have the pros that will get the job done quickly, efficiently, and at the right price. We guarantee 100% customer satisfaction on every project or task we perform. We don't use outside labor and are proud to be one of the highest rated contractors on Angie's List. Give us a call today 703-444-0000. Additional email - [email protected]. Phone - (703) 444-0000

"I claimed one of the “2 Toilet Tune-Up” Angi’s special with 4 Service Pros (Snell). When I contacted Snell I talked with a very nice lady who scheduled me to get 2 plumbers to come out the next day from Noon - 4pm. I was told they would call 20 minutes to 30 minutes before hand to let me know they were coming. I waited from Noon to 4:05pm, never received a phone call, and so I called Snell to find out if my plumbers were still coming. I was told that there was an emergency situation in Chantilly, VA, that required my 2 plumbers to go to Chantilly instead of my place that morning. I understand emergencies do happen, but Snell knew that my plumbers were needed for that major Chantilly, VA, leak from the morning. They should have called me once they found out that my assigned plumbers would not be able to come out to my place within my scheduled time appointment. I should not have had to wait from noon to 4pm and then have to call them to find out that they were not coming. I rescheduled with them, and set another appointment for the next day The next day Brandon Thomas came out, and he was outstanding. He is very friendly, professional, knowledgeable, efficient, and a very good plumber. My problems turned out to be quite different than I originally had thought and he explained my options. I went with the option that he recommended and am very happy with the results. He also gave me discounts to help make-up for my inconvenience for having to re-schedule the appointment. I definitely recommend Snell (4 Service Pros) to all my friends and family."

Janice M on September 2024

4 Service Pros has 4 separate divisions. Each Professional we employ only works in the trade they are licensed in. Electrical, Plumbing, HVAC and Remodeling services... Based in Northern Virginia & serving customers throughout the metro area. We do everything from new installations and repairs to preventative maintenance. Our company welcomes jobs of all sizes. We have extensive experience working with countless residential and commercial customers in Northern Virginia and surrounding areas. Whether you need a leak fixed or complete rewiring, we have the pros that will get the job done quickly, efficiently, and at the right price. We guarantee 100% customer satisfaction on every project or task we perform. We don't use outside labor and are proud to be one of the highest rated contractors on Angie's List. Give us a call today 703-444-0000. Additional email - [email protected]. Phone - (703) 444-0000

"I claimed one of the “2 Toilet Tune-Up” Angi’s special with 4 Service Pros (Snell). When I contacted Snell I talked with a very nice lady who scheduled me to get 2 plumbers to come out the next day from Noon - 4pm. I was told they would call 20 minutes to 30 minutes before hand to let me know they were coming. I waited from Noon to 4:05pm, never received a phone call, and so I called Snell to find out if my plumbers were still coming. I was told that there was an emergency situation in Chantilly, VA, that required my 2 plumbers to go to Chantilly instead of my place that morning. I understand emergencies do happen, but Snell knew that my plumbers were needed for that major Chantilly, VA, leak from the morning. They should have called me once they found out that my assigned plumbers would not be able to come out to my place within my scheduled time appointment. I should not have had to wait from noon to 4pm and then have to call them to find out that they were not coming. I rescheduled with them, and set another appointment for the next day The next day Brandon Thomas came out, and he was outstanding. He is very friendly, professional, knowledgeable, efficient, and a very good plumber. My problems turned out to be quite different than I originally had thought and he explained my options. I went with the option that he recommended and am very happy with the results. He also gave me discounts to help make-up for my inconvenience for having to re-schedule the appointment. I definitely recommend Snell (4 Service Pros) to all my friends and family."

Janice M on September 2024


Avatar for W H Winegar & Son Plumbing and Heating

W H Winegar & Son Plumbing and Heating

4.86(
444
)

W H Winegar & Son Plumbing and Heating

4.86(
444
)
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

Award winning, family owned & operated. For over 40 years, W.H. Winegar & Son Plumbing and Heating has served the Burtonsville, MD, and surrounding areas with a commitment to service and value. We appreciate your interest and look forward to earning your business. Additional Phone - (301) 907-4650; Payment also accepted by cash.

"Awesome. Two separate jobs. Both went well."

Benjamin S on November 2021

Award winning, family owned & operated. For over 40 years, W.H. Winegar & Son Plumbing and Heating has served the Burtonsville, MD, and surrounding areas with a commitment to service and value. We appreciate your interest and look forward to earning your business. Additional Phone - (301) 907-4650; Payment also accepted by cash.

"Awesome. Two separate jobs. Both went well."

Benjamin S on November 2021


Avatar for Environmental Testing & Research Laboratories, Inc

Environmental Testing & Research Laboratories, Inc

4.85(
347
)

Environmental Testing & Research Laboratories, Inc

4.85(
347
)
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018


Avatar for Quality Air & Heating Inc

Quality Air & Heating Inc

4.94(
48
)

Quality Air & Heating Inc

4.94(
48
)
Customers say: Super punctual
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

Let us take care for your furnace, central air, ductwork, and any part of your heating or air conditioning systems. Your new energy efficient system could save you as much as 30%. We also provide plumbing, whole house duct cleaning and indoor air quality. Call Quality Air & Heating Inc. for any plumbing, heating, or cooling emergency issues. With our 24-hour emergency services, we have got you covered any time there's a problem in your home.

"Mr. David Hung and his Team did an Excellent Job in the Installation of Tankless water Heater. They tested the access to hot water in three floor Levels. I am getting hot water rapidly. I am waiting for the final phase of Installation of the Split-level gas meter upgrade. I shall make the final part of total Payment after this installation. David is honest in professional matters. I wish him and Quality Air well in these novel installations in WDC Area."

Mrinal D on February 2023

Let us take care for your furnace, central air, ductwork, and any part of your heating or air conditioning systems. Your new energy efficient system could save you as much as 30%. We also provide plumbing, whole house duct cleaning and indoor air quality. Call Quality Air & Heating Inc. for any plumbing, heating, or cooling emergency issues. With our 24-hour emergency services, we have got you covered any time there's a problem in your home.

"Mr. David Hung and his Team did an Excellent Job in the Installation of Tankless water Heater. They tested the access to hot water in three floor Levels. I am getting hot water rapidly. I am waiting for the final phase of Installation of the Split-level gas meter upgrade. I shall make the final part of total Payment after this installation. David is honest in professional matters. I wish him and Quality Air well in these novel installations in WDC Area."

Mrinal D on February 2023


Avatar for Mallick Plumbing & Heating

Mallick Plumbing & Heating

4.83(
183
)

Mallick Plumbing & Heating

4.83(
183
)
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers

Mallick Plumbing & Heating provides any and all types of plumbing services to residential and commercial clients throughout the entire Washington Metropolitan Area and Silver Spring, Maryland. We currently have a fleet of over twenty full-time service technicians and twelve apprentices, which are led by Vice President Ken Howes and Residential Service Manager Jeff Fletcher. Mallick conducts pre-employment screenings on each candidate after making a contingent offer of employment. State judiciary and national case searches are completed, as well as state and national sex offender searches. In addition to extensive background checks, substance abuse tests are administered. Mallick is a drug-free workplace and we strive to ensure the environment remains safe for our employees and our customers. Our team has over 30 years of experience in the plumbing industry and is dedicated to providing quality workmanship and the highest customer satisfaction. Our family approach to business has allowed us to build strong long-lasting relationships with contractors, owners, suppliers, subcontractors and employees, and we look forward to the opportunity to provide honest plumbing services for you and your family. 9X Super Service Award Winner from 2012-2022 and voted best Gaithersburg Plumber 2020, 2021, 2022 & 2023

"Mallick technicians Billy and Bryce fixed a bathroom leak and did a thorough inspection of our bathrooms and discovered plumbing issues that if not fixed could have caused a major issue in our 30 year old bathroom renovation. They were efficient, professional and personable. Would highly recommend."

Liz C on April 2025

Mallick Plumbing & Heating provides any and all types of plumbing services to residential and commercial clients throughout the entire Washington Metropolitan Area and Silver Spring, Maryland. We currently have a fleet of over twenty full-time service technicians and twelve apprentices, which are led by Vice President Ken Howes and Residential Service Manager Jeff Fletcher. Mallick conducts pre-employment screenings on each candidate after making a contingent offer of employment. State judiciary and national case searches are completed, as well as state and national sex offender searches. In addition to extensive background checks, substance abuse tests are administered. Mallick is a drug-free workplace and we strive to ensure the environment remains safe for our employees and our customers. Our team has over 30 years of experience in the plumbing industry and is dedicated to providing quality workmanship and the highest customer satisfaction. Our family approach to business has allowed us to build strong long-lasting relationships with contractors, owners, suppliers, subcontractors and employees, and we look forward to the opportunity to provide honest plumbing services for you and your family. 9X Super Service Award Winner from 2012-2022 and voted best Gaithersburg Plumber 2020, 2021, 2022 & 2023

"Mallick technicians Billy and Bryce fixed a bathroom leak and did a thorough inspection of our bathrooms and discovered plumbing issues that if not fixed could have caused a major issue in our 30 year old bathroom renovation. They were efficient, professional and personable. Would highly recommend."

Liz C on April 2025



Avatar for Suma Plumbing and Drain Cleaning, LLC

Suma Plumbing and Drain Cleaning, LLC

4.81(
63
)

Suma Plumbing and Drain Cleaning, LLC

4.81(
63
)
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Finding the right plumbing company can be a struggle sometimes. Suma Plumbing and Drain Cleaning offers quick, reliable service you can trust. We are dedicated to helping you when you need it the most and we leave all of our jobs tidy and clean.

"Very professional and reliable. I had a complicated sump pump issue and he really took his time to get it right which I really appreciate. I'll be calling him the next time I have any plumbing issues in my house."

Morgan M on September 2024

Finding the right plumbing company can be a struggle sometimes. Suma Plumbing and Drain Cleaning offers quick, reliable service you can trust. We are dedicated to helping you when you need it the most and we leave all of our jobs tidy and clean.

"Very professional and reliable. I had a complicated sump pump issue and he really took his time to get it right which I really appreciate. I'll be calling him the next time I have any plumbing issues in my house."

Morgan M on September 2024


"I contacted Stang Plumbing to give me an estimate on replacing the copper water supply piping (hot and cold) in my house with PEX A. Stang gave me a reasonable estimate right from the start. The two other estimates I requested further confirmed that Stang’s estimate was very reasonable and after they promptly responded to several questions I had concerning their proposal, I chose them to do the work. The workers showed up promptly on the first day to start the work and every day thereafter. The lead plumber, Rob, did a great job of communicating the progress at the end of the day and what he intended to accomplish the next day. Each day Rob made sure that water service was restored through out the house and that there were no leaks from the work that had been performed. The piping replacement was completed on the schedule originally proposed. Rob, and his helper Mark, were very professional and courteous and a pleasure to deal with. I will happily chose Stang Plumbing for any future work and highly recommend them for any plumbing services you may need."

Edward B on September 2023

10 Employees. No subs. Cost is determined by the job itself. Service Fees Apply for certain equipment. Extra charge applies for after hours and weekend services.

"I contacted Stang Plumbing to give me an estimate on replacing the copper water supply piping (hot and cold) in my house with PEX A. Stang gave me a reasonable estimate right from the start. The two other estimates I requested further confirmed that Stang’s estimate was very reasonable and after they promptly responded to several questions I had concerning their proposal, I chose them to do the work. The workers showed up promptly on the first day to start the work and every day thereafter. The lead plumber, Rob, did a great job of communicating the progress at the end of the day and what he intended to accomplish the next day. Each day Rob made sure that water service was restored through out the house and that there were no leaks from the work that had been performed. The piping replacement was completed on the schedule originally proposed. Rob, and his helper Mark, were very professional and courteous and a pleasure to deal with. I will happily chose Stang Plumbing for any future work and highly recommend them for any plumbing services you may need."

Edward B on September 2023


Avatar for Pristine Water Treatment

Pristine Water Treatment

4.83(
95
)

Pristine Water Treatment

4.83(
95
)
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

Financing available with qualified purchase. Trade ins welcome for new whole house water treatment systems. We service all makes and models water treatment equipment. We also do minor plumbing work. New Systems we include a lifetime transferable warranty. All new systems are chemical free. ***Proud Winner of Water Quality Products Dealer of the Month*** http://www.wqpmag.com/family-legacy 10% off Senior Citizens and Military drinking water,drinking water filter,home water treatment system,reverse osmosis system,water filter,water filtration,water heater,water purification,water softening,water treatment

"Pristine did a great job. We were pleased they were willing to hook up existing equipment, as some companies had refused to. (Our previous company had gone out of business, and they complimented the existing work.) They worked quickly and cleaned up after themselves. Now our water is acid free and has fewer minerals. No more white powder everywhere!"

Jessica B on March 2021

Financing available with qualified purchase. Trade ins welcome for new whole house water treatment systems. We service all makes and models water treatment equipment. We also do minor plumbing work. New Systems we include a lifetime transferable warranty. All new systems are chemical free. ***Proud Winner of Water Quality Products Dealer of the Month*** http://www.wqpmag.com/family-legacy 10% off Senior Citizens and Military drinking water,drinking water filter,home water treatment system,reverse osmosis system,water filter,water filtration,water heater,water purification,water softening,water treatment

"Pristine did a great job. We were pleased they were willing to hook up existing equipment, as some companies had refused to. (Our previous company had gone out of business, and they complimented the existing work.) They worked quickly and cleaned up after themselves. Now our water is acid free and has fewer minerals. No more white powder everywhere!"

Jessica B on March 2021

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FAQs for water softener service projects in Kemp Mill, MD

The license requirements for water softener installation depend on your location. Some municipalities require that the installer hold a plumbing license, some require a permit and an inspection, but no license for the installer, and some require a permit and a license for the installer. Regardless of the local laws in your area, it’s always a good idea to hire a licensed plumber or installer. These pros will install your system properly and have the experience to size the system appropriately. Use Angi’s state licensing tool to check your installer’s license status.

Water softeners are worth the money if you live in an area with hard water. Hard water is safe to drink, but it poses serious threats to your plumbing system. The minerals in hard water will gradually build up on the inside walls of your pipes, reducing water flow to your fixtures. The minerals can also gradually corrode your plumbing system, reduce its lifespan, and increase the risk of leaks. Hard water also makes soap and detergent less effective. Water softener systems can solve all these issues, making them a great investment.

It’s possible to install a water softener yourself, but we don’t recommend it. Water softeners require working with copper pipes and electrical wiring, neither are suitable tasks for most DIYers. Plus, working with water and electricity together is dangerous and could pose a risk to your safety. Water softeners also need to be calibrated so that they don’t make your water too soft, as soft water poses just as many risks as hard water. Overall, it’s well worth hiring a local water softener installer to place your water softener system.

The cost to install a water softener system is $1,500 on average, ranging between $200 and $6,000. The labor for water softener work typically costs between $150 and $1,000, so you can add that to your equipment costs to get an accurate total. Your price will depend on many factors, including the following:

  • System capacity 

  • Home size

  • Water hardness levels

  • Type of water softener

  • Presence of electricity in the installation area

  • Local permit costs

Your water softener size is based on your total household water consumption. In most cases, you can assume the average household member will use around 75 gallons per day. Multiply that by the number of people in your home, then multiply by 10 (for the typical grains per gallon). You’ll get a number in grains that should help roughly size your water softener. However, it’s best to hire a professional to install your system and use more exact numbers, like your exact average water consumption per day and starting water hardness.

The Kemp Mill, MD homeowners’ guide to water softener services

From average costs to expert advice, get all the answers you need to get your job done.