Modern Plumbing Systems strives to be your best option when it comes to plumbing service. It is our business to deliver to your home a LICENSED, PROFESSIONAL PLUMBER that makes your service experience the best it can be. All of our technicians are highly trained, with a minimum of 10 years plumbing experience. Please call any time to speak with a certified professional plumber. We are standing by to help you now.
"Great customer service, fast response and very reasonable price. Will definitely use them again."
John Y on May 2025
Modern Plumbing Systems strives to be your best option when it comes to plumbing service. It is our business to deliver to your home a LICENSED, PROFESSIONAL PLUMBER that makes your service experience the best it can be. All of our technicians are highly trained, with a minimum of 10 years plumbing experience. Please call any time to speak with a certified professional plumber. We are standing by to help you now.
"Great customer service, fast response and very reasonable price. Will definitely use them again."
John Y on May 2025
Pohlman Plumbing is a local, family-owned and -operated full-service plumbing and HVAC company serving the Baltimore metro area. Founded in 2008, our professional and friendly customer service plus our top-notch skills have made us one of the most trusted local plumbers in Baltimore. When you choose to work with Pohlman Plumbing, you can have peace of mind knowing we always stand by the Pohlman Promise: fast service, at a fair price, and done right the first time.
"The gentleman that work this business go above and beyond to make the best suggestions for they work required. This is the second time I have hired them. My sub pump went after and more rain was coming they came out with 2 hours to fix the problem. Extremely professional man. I will be er use any other plumbing business other than Pohlman. I highly recommend if you have a plumping issue."
Georgette T on January 2024
Pohlman Plumbing is a local, family-owned and -operated full-service plumbing and HVAC company serving the Baltimore metro area. Founded in 2008, our professional and friendly customer service plus our top-notch skills have made us one of the most trusted local plumbers in Baltimore. When you choose to work with Pohlman Plumbing, you can have peace of mind knowing we always stand by the Pohlman Promise: fast service, at a fair price, and done right the first time.
"The gentleman that work this business go above and beyond to make the best suggestions for they work required. This is the second time I have hired them. My sub pump went after and more rain was coming they came out with 2 hours to fix the problem. Extremely professional man. I will be er use any other plumbing business other than Pohlman. I highly recommend if you have a plumping issue."
Georgette T on January 2024
Were dedicated to providing our clients with the very best in service, installation, and repair for all phases of your plumbing needs. We specialize in a variety of residential and commercial services and take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.
"He came be ause I had someone else replace my well pump and still had no water. He showed up on time and checked everything. He had to pull the pump again and it ended up being the wiring. He ran the wire the whole length of the pipe,at least 300 feet or more. Then pump the pump back in the ground. He installed a gauge on my water tank and made sure we had water before he left. All this in the humid weather that day. He was very nice and knowledgeable. And very professional. Would definately use him again."
Jen J on July 2021
Were dedicated to providing our clients with the very best in service, installation, and repair for all phases of your plumbing needs. We specialize in a variety of residential and commercial services and take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.
"He came be ause I had someone else replace my well pump and still had no water. He showed up on time and checked everything. He had to pull the pump again and it ended up being the wiring. He ran the wire the whole length of the pipe,at least 300 feet or more. Then pump the pump back in the ground. He installed a gauge on my water tank and made sure we had water before he left. All this in the humid weather that day. He was very nice and knowledgeable. And very professional. Would definately use him again."
Jen J on July 2021
Corbin Plumbing Mechanical is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. +4 Years of Experience
Corbin Plumbing Mechanical is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. +4 Years of Experience
Atlantic Blue Water Services provides the highest quality and most specialized home water treatment systems in today's market. We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Don't settle for anything less than the best for your home or business. Experience the difference with Atlantic Blue Water Services. Contact us now for a free, no-obligation water test and discover why we are the preferred choice for clean water solutions in Maryland. Our experienced team is ready to answer your questions and guide you toward the best water solution for your home or business. We invite you to trust us with your water needs! Water Testing - Water Treatment - Water Softening - Well Water - City Water - Well Pumps - Tanks - Drinking Systems - Reverse Osmosis - Residential & Commercial
"These guys - wow. Even though my address was outside their range for same-day service, they came out anyway (and quickly). They quickly diagnosed the issue and offered solutions & recommendations. Very prompt, very professional, will absolutely be using them going forward. A"
Don P on September 2024
Atlantic Blue Water Services provides the highest quality and most specialized home water treatment systems in today's market. We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Don't settle for anything less than the best for your home or business. Experience the difference with Atlantic Blue Water Services. Contact us now for a free, no-obligation water test and discover why we are the preferred choice for clean water solutions in Maryland. Our experienced team is ready to answer your questions and guide you toward the best water solution for your home or business. We invite you to trust us with your water needs! Water Testing - Water Treatment - Water Softening - Well Water - City Water - Well Pumps - Tanks - Drinking Systems - Reverse Osmosis - Residential & Commercial
"These guys - wow. Even though my address was outside their range for same-day service, they came out anyway (and quickly). They quickly diagnosed the issue and offered solutions & recommendations. Very prompt, very professional, will absolutely be using them going forward. A"
Don P on September 2024
Constellation Home provides high-quality, personal service that you've depended on for decades. Constellation Home is Maryland's go-to home service provider your water heater installation needs. Our team will arrive on time, in uniform and ready to get the job done right the first time. All backed by our 100% satisfaction guarantee. We Know More, We Do More.
"nothing to add"
Rion S on May 2025
Constellation Home provides high-quality, personal service that you've depended on for decades. Constellation Home is Maryland's go-to home service provider your water heater installation needs. Our team will arrive on time, in uniform and ready to get the job done right the first time. All backed by our 100% satisfaction guarantee. We Know More, We Do More.
"nothing to add"
Rion S on May 2025
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs, and expectations of our customers, we take great care to work, and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
"Dean and his employees where very professional. The job was well done and very efficient. The price was very good! I would recommend Dean and his employees to everyone. Keep up the good work gentlemen. "
Raymond V on April 2025
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs, and expectations of our customers, we take great care to work, and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
"Dean and his employees where very professional. The job was well done and very efficient. The price was very good! I would recommend Dean and his employees to everyone. Keep up the good work gentlemen. "
Raymond V on April 2025
We are in the industry providing plumbing and fire protection systems to residents and businesses in and around Maryland for over 22 years. During all this time we were working to improve customer satisfaction before, during and after the service based on our agile management, trained team and quality materials. Now, years of experience in the market allows us to guarantee that our work will be of the highest quality.
"Family Fire Service did a great job replacing my water heater! They were quick, attentive, and thorough. Excellent work! "
Hassan C on May 2025
We are in the industry providing plumbing and fire protection systems to residents and businesses in and around Maryland for over 22 years. During all this time we were working to improve customer satisfaction before, during and after the service based on our agile management, trained team and quality materials. Now, years of experience in the market allows us to guarantee that our work will be of the highest quality.
"Family Fire Service did a great job replacing my water heater! They were quick, attentive, and thorough. Excellent work! "
Hassan C on May 2025
Prime Plumbing is proud to be a family owned, locally operated business that has been working in the community since 2012! With years of experience and unmatched expertise we can help with any and all of your plumbing needs. Since opening our doors we have built our business on providing our customers with the highest quality products and service at a fair price. Our customers can count on our techs being timely, tidy and when the job is done that you will be 100% satisfied with the work completed. When you need a plumber, think Prime Plumbing and let us show you why our customers become customers for life.
"Fair"
Clyde M on May 2025
Prime Plumbing is proud to be a family owned, locally operated business that has been working in the community since 2012! With years of experience and unmatched expertise we can help with any and all of your plumbing needs. Since opening our doors we have built our business on providing our customers with the highest quality products and service at a fair price. Our customers can count on our techs being timely, tidy and when the job is done that you will be 100% satisfied with the work completed. When you need a plumber, think Prime Plumbing and let us show you why our customers become customers for life.
"Fair"
Clyde M on May 2025
Washington Home Doctors, Inc. T/A HotWaterExpress.com established in 1986 is a locally and family owned, fully licensed one stop shop for most of your home repair needs. We specialize in residential and commercial Full Water Heater Service! Other areas of expertise are General Plumbing, Heating & Air conditioning, and home improvements. Washington Home Doctors holds Home Improvement Contractor Licenses for Washington D.C. & Maryland State, a Master Plumbing License for W.S.S.C. & Maryland and Virginia jurisdictions, an HVAC License and we are a certified MBE (Minority Business Enterprise) company. We would love an opportunity to be your go to home repair services provider.
"They were very knowledgeable and courteous with pleasant personalities. They also were able to give me a quote over the phone. They did an excellent job at a great rate and were very prompt. I definitely would use them again!"
Cheryll L on May 2025
Washington Home Doctors, Inc. T/A HotWaterExpress.com established in 1986 is a locally and family owned, fully licensed one stop shop for most of your home repair needs. We specialize in residential and commercial Full Water Heater Service! Other areas of expertise are General Plumbing, Heating & Air conditioning, and home improvements. Washington Home Doctors holds Home Improvement Contractor Licenses for Washington D.C. & Maryland State, a Master Plumbing License for W.S.S.C. & Maryland and Virginia jurisdictions, an HVAC License and we are a certified MBE (Minority Business Enterprise) company. We would love an opportunity to be your go to home repair services provider.
"They were very knowledgeable and courteous with pleasant personalities. They also were able to give me a quote over the phone. They did an excellent job at a great rate and were very prompt. I definitely would use them again!"
Cheryll L on May 2025
You'll need an expansion tank if your home has a closed water system, which is standard in newer homes or those with backflow preventers or pressure regulators. Expanding hot water has nowhere to go in closed systems, creating potentially damaging pressure. The expansion tank provides space for this expanded water, protecting your plumbing system and water heater from premature failure. Many local building codes now require expansion tanks, and some water heater warranties may be voided without one.
For a standard 50-gallon water heater, a two-gallon expansion tank is sufficient. This sizing assumes normal household water pressure between 40 and 60 psi. If your home has higher water pressure (60 to 80 psi), consider upgrading to a slightly larger tank for added protection. The expansion tank's purpose is to accommodate the increased volume that occurs when cold water heats up, which is proportional to your water heater's capacity.
Watch for signs like dripping water around the tank, fluctuating water pressure throughout your home, or unusual noises in your plumbing system. A properly functioning expansion tank should feel light when tapped on the bottom—if it feels heavy or waterlogged, the internal bladder has likely failed. Other indicators include frequent triggering of your temperature and pressure relief valve, visible corrosion on the tank, or unexplained increases in your water bill, suggesting hidden leaks.
Most expansion tanks have a service life of five to 10 years, though some may last up to 12 years or more with proper maintenance. Factors affecting lifespan include water quality, system pressure, installation quality, and tank construction. Hard water areas often see shorter lifespans due to mineral buildup. Regular maintenance checks can help identify potential issues before complete failure. When your water heater is due for replacement, it's wise to replace the expansion tank simultaneously, even if it hasn't failed yet.
A 30-gallon water heater needs an expansion tank if your home has a closed plumbing system. The need for an expansion tank is determined by your plumbing system type rather than water heater size. Even smaller water heaters create thermal expansion when heating water. If your home has a backflow preventer, pressure regulator, or check valve on the main water line, you have a closed system that requires an expansion tank. Check your local plumbing codes, as many jurisdictions now mandate expansion tanks regardless of water heater size.