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From washing dishes to showering, having heated water is one luxury we’d rather not live without. When your water heater has an issue, finding and fixing the problem quickly is important to maintaining comfort in your household. We offer reliable electric and gas water heater repair or installation services in areas such as Delaware, Maryland, and Pennsylvania. Give our staff a call by phone at (302) 367-7915 to schedule an appointment.

It’s ideal to have your water heater inspected by a professional yearly to ensure optimal performance and make sure there are no leaks or fire hazards. We provide credible water heater services to households in areas such as Drexel Hill, Newark, Wilmington, Elkton, Upper Darby, Dover, and Easton.  Have questions about your water heater? We can help. Since 1951, ServiceMark has been committed to your comfort. Our team’s continued education guarantees you receive the most up-to-date water heater repair or replacement services.

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Water Heater FAQs

  • Why is my water heater leaking?
    • Most likely, you have a crack or there is a leak at a fitting or connection on the water heater. Read more about what to do when your water heater is leaking here.
  • Why won’t my pilot light?
    • You may have a faulty part in your water heater, or a bad thermocouple.
  • Should I clean my water heater?
    • Periodically flush your water heater in order to clean sediment from the tank and avoid erosion. We recommend flushing it once a year.
  • Why is my water heater not getting hot?
    • Your water heater may not be getting hot for a host of reasons, including it being too small, a build up of sediment, or you may need the thermocouple replaced in the unit.

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Signs It’s Time to Repair or Replace Your Water Heater

When a water heater stops working, life can become uncomfortable. Knowing how to resolve the problem and get the water heater back up and running quickly can mean the difference between a warm shower or a cold one. But how do you know if you’re looking at a simple repair or a total replacement? Below are a few common water heater issues and what may be your best bet for resolving the issue: 

Not Heating

If cold water is flowing even when the hot water tap is turned on, the pilot light on your gas water heater may have gone out. This can happen occasionally and can be a quick fix. If relighting the pilot doesn’t work, there may be an issue with the gas line. Never attempt to fix a gas issue on your own. Call a professional for help with gas line issues.

Strange Noises

Popping noises from your water heater may indicate a build-up of minerals and sediment at the bottom of the water tank. Over time this sediment build-up can trap water causing pressure to build. To prevent damage to the hot water tank, give our team of licensed plumbers a call by phone at (302) 367-7915 to schedule a water heater repair service. Once we arrive at your house, we will flush the system to remove the excess minerals that are causing the noises.


A leaking water heater needs immediate attention. Calling a certified technician as soon as a leak is spotted can help you avoid a bigger mess. Although not always the case, a leaking water heater typically means it’s time for a replacement.


Water heaters don’t last forever. The average lifespan of a gas water heater is 10-15 years with diligent maintenance. If your water heater is more than 10 years old or you’re experiencing issues, give our team of licensed contractors a call at (302) 367-7915 to book an appointment. We offer fast and dependable water heater installation and repair services to homes in areas such as Easton, Darby, Newark, and Upper Darby. Our staff is trained to repair or replace water heaters from a variety of manufacturers.

Extend The Life of Your Water Heater 

Water heaters are an investment. Proper maintenance will ensure your investment lasts. Extend the life of your water heater by flushing it at least once a year. This flush will remove the sediment that has built up and lower the risk of corroding and rusting. 

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Water Heaters

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ServiceMark is your trusted resource for water heater maintenance, replacement, and installation services. To meet your needs, our team of technicians is trained to provide service on the following types of furnaces:

Standard electric

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Water HeatersHow a Gas Water Heater Works

Gas Burners Are Activated to Heat the Water

Cold water is distributed to the tank of a gas water heater through a dip tube. Once the cold water reaches the base of the water tank, a gas burner is activated to increase the temperature of the water before it reaches the fixtures in your house. A water heater operates on natural gas to create the heat required to produce warm water. Next, the poisonous air that was created during the combustion process is circulated to the outdoor air through an exhaust pipe that is in the middle of your hot water heater.

Warm Water is Distributed to Your Fixtures

As the natural gas travels through the exhaust pipe, the exterior of the pipe will become hot. Once the exhaust pipe is warm, it will transfer heat energy to the surrounding water in the hot water tank. Next, the hot water will begin to rise to the top of the water heater and will be dispersed to fixtures in your house through a hot water pipe. Gas water heaters are equipped with a thermostat that is designed to allow you to control the allocation of natural gas to the burners.

Cold Water Starts to Fill the Water Tank

New cold water will be introduced to the water tank through the water dip tube to replace the hot water that was collected. If the pressure in the water tank becomes too high, cracks will start to form at the base of the water heater. To prevent damage to the interior of the tank, a water heater is integrated with a temperature and pressure relief valve. This valve is engineered to discharge water if the temperature of the water tank becomes too warm.

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Water Heater RepairRemove Minerals in the Tank With the Drain Valve

The last important component of a hot water heater is the drain valve. The water drainage valve is located near the front of the water heater. The valve is designed to be connected to a water hose to release minerals from the interior of the water tank.

Replace Anode Rod to Prevent Corrosion to the Water Tank

The interior of the water tank features insulation to prevent heat loss while the water is stored. In addition, a gas water heater includes an anode rod that is engineered to prevent the formation of rust on the interior walls of the hot water tank. The rod will collect the rust particles before they start to grow in the water heater. An anode rod should be replaced every 2 to 5 years to prevent corrosion in the tank.

Are you having problems with your hot water heater? This is a sign of a broken gas burner or a clogged dip tube. Give our team of licensed plumbers a call by phone at (302) 367-7915 to create an appointment. We offer water heater repair and replacement services to homes in areas such as Abington, Upper Darby, Easton, and Newark.

How An Electric Water Heater Operates

An electric water heater is equipped with a cold water pipe that is designed to push new water to the water tank. Once the cold water has arrived at the tank, a set of electric heating elements is activated to heat the water. Next, the hot water in the tank is collected by a warm water pipe and is circulated to each room in your house. In addition, an electric water heater features a drainage valve, temperature and pressure relief valve, and insulation.

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Water Heater Services5 Types of Hot Water Heater Problems & Troubleshooting Methods

Inefficient Hot Water Production

If you do not receive hot water within 1 to 2 minutes of activating your shower, this is a sign that your water heater is not creating warm water efficiently. The source of the cold water may be related to a broken electric heating element, a malfunctioning thermostat, damaged gas burners, or mineral build-up on the heating elements. Our team of emergency plumbers have the tools and resources necessary to determine the cause of the cold water in your house. We offer trustworthy and fast water heater repair and replacement services in areas such as Chestertown, Drexel Hill, Darby, Middletown, and Conshohocken. Give our staff a call by phone at (302) 367-7915 to talk with an expert. Our team of technicians will perform an inspection of your gas burners or heating elements to detect and resolve the problem.

Discolored Warm Water

The warm water coming out of your sink may be discolored due to the formation of rust on the anode rod in your hot water heater. On the other hand, the source of the brown water may be corrosion on the interior of the water tank. If your house is over 30 years old, the cause of the contaminated water may be a deteriorating water pipe behind your walls or ceiling. Do not attempt to replace a broken water line without a licensed local plumber.

Damaged Thermocouple

Prior to purchasing a new water heater, perform an inspection of the thermocouple in your hot water heater. The thermocouple is a small part that is engineered to detect the pilot light on the water tank. If the thermocouple does not detect a flame, it will deactivate the gas valve to prevent a gas leak in your house. Once the gas valve is closed, the gas burners in the water heater will not ignite. If you are not receiving hot water in your shower, perform an inspection of the pilot light.

Follow the instructions that came with your water heater to ignite the pilot light. Watch the miniature flame for a couple of seconds to confirm it does not burn out. If the pilot light deactivates when you are finished fixing it, this is a sign of a broken thermocouple. We offer water heater repair, maintenance, and replacement services to homes in Delaware, Maryland, and Pennsylvania. Give our team of plumbers a call by phone at (302) 367-7915 to create an appointment. Our certified technicians will remove the burner assembly to replace the damaged thermocouple in your water heater. In addition, our staff will vacuum the gas burners to eliminate dust and dirt.

Low Warm Water Pressure

If you notice low water pressure while you are washing the dishes, this is an indicator of clogged water pipes. On the other hand, the source of the water pressure may be small water pipes. To increase the water pressure in your house, replace the old pipes that are connected to your water heater with ¾-inch water pipes to enhance the flow of hot water to your sink or showeer.

Tank Leaks

Once the tank of a hot water heater starts to leak, this is a sign of a crack or hole. Dark spots near the top and bottom of the water heater are an indicator of corrosion in the interior of your water heater. If the water heater is not replaced, the leak will become more severe and cause damage to the walls or floors in your house. To prevent the growth of mold in your walls, it’s important to hire a licensed plumber to replace your water heater before water damage occurs.

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