Guide for Flushing a Water Heater – How often we need to Flush?

When speaking about a few household tasks, it is easy and simple to flush a water heater. Frequently flushing the water heater is a very vital chore in order to clear the accumulated junk and other mineral deposits. This will aid the hot water heater to work more effectively and even increases its life period and also helps in keeping the money saved for the long run. So, How to Flush a Water Heater? Let’s see that in this guide.

How to Flush a Water Heater?

After a long period of time minerals get deposited at the base level of the water heater and they form a very thick and hard coating. This coating will lessen the heat transfer from the burner to the water in a tank. Even it may lead to corrosion.

How to Flush a Water Heater image

How to Flush a Water Heater image

How to flush a Hot Water Heater? – Simple Steps

Generally, hot water heater comes in two different types one is gas and the other one is electric. The major dissimilarity between the electric and gas water heater is that when working with gas you need to turn off the gas whereas with electric you need to turn off the electric. Below are the instructions will guide how to flush a hot water heater? 

  1. Turn off the knob on the water heater thermostat: Adjust thermostat of the gas heater to pilot that is commonly present near the base of the tank, but for more conscious it is better to completely turn it off. For an electric heater, you should to find out the homes surf box and power off switch, which supplies power to the water heater. 
  2. Turn off the water supply to the water heater: Stop the cold water supply valve usually situated close to the crest of the water heater. 
  3. Turn on the hot water tap in the sink or tub: Leave them open during the complete flushing process, as it will help to prevent the vacuum forming in the lines during the process of draining the water tank. 
  4. Open pressure relief valve: This is not a mandatory step, but it will help to flow the water more easily during draining and also helps to examine the pressure relief tap. Before opening the valve set some container below the drainage pipe because the water may come out. Be very cautious since the water is too hot. If the water does not come out, then the pressure relief pipe is not working properly so you need to replace it. 
  5. Attach the garden pipe to drainage spout: Before you make the spigot turn on ensuring that the other end of a hosepipe is positioned external or place it in one container. If the location of the water heater is in the basement then you require acquiring a moveable pipe for the water to pump out of the cellar to the ground floor.
  6. Turn on the spigot and drain: Deplete the tank for the water to run clear so that water does not have any sediment. If the tank has a lot of sediments then you require depleting it totally. 
  7. Flush: for the hot water tank to flush just turn the cold water valve on, that departs to the hot water tank. Leave it in this way for a few minutes until the water coming out from the hosepipe is apparent. This takes some time. Even if the water runs clear it might still have a few sediments. So go on to flush till you get very small or no more dregs in the water. At last turn the water spigot off directing to the hot water tank.

Finishing up the things

Once you get satisfied with the clarity of the water, now it is the time to put back the things to the way where they are.

  • Make the drainage faucet off and cut off the hose.
  • If the pressure relief tap is opened, close it.
  • Make the water supply on the tub or sink turn off that was turned on at the starting of the water heater flushing process.
  • Turn the water supply valve on that is leading to a water heater
  • Open the pressure relief tap when the water tank is full for letting the excess air to go out. 
  • Turn the hot water tap “On” on the tub and sink for the air to go away from the unit. At this position off the cold water supply that is leaking out of the spigot. 
  • If the gas to the water heater is shut off then turn on
  • Relight the pilot on the thermostat and then turn it on.
  • If you are using an electric water heater then flip the switch on the electrical panel that supplies power to the water heater.
  • Wait for about 20 min for the water to get heat up and then check out whether the water is hot or not.

How often to Flush Water Heater?

How often to Flush Water Heater image

How often to flush a water heater, depends on the size of a tank and quantity of hot water used. The more the usage of hot water, the greater the maintenance is required. The need for flushing a water heater also depends on the quality of water and region. The harder the water then you require draining the water heater more frequently. It is better to refer to the manufacturer manual.

After a certain period, water heater sludge gathers at bottom of the tank as sediment, minerals, and other deposits settle in water. Draining out these deposits extends the heaters life and prevents the malfunctions like cold bursts of water. Overall it is good to stick to manufacturer recommendations. 

Following instructions serves as a general guide, if you don’t have the manufacturer’s instructions.

  • One or two people at home: Inspect for every 6months and drain for every 12 months.
  • Three to five people at home: Inspect for every 4 months and drain for every 8 months.
  • Six or more people at home: Inspect for every 4 months and drain for every 6 months.

Frequently it is necessary to drain the hot water tank as the water supplied from well or the other municipal water contains high sediment composition. To know about Best Water Heater Reviews, visit our portal regularly.

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