Yes, plumbers drain and flush water heaters. This maintenance is typically recommended once a year to remove built-up sediment, prolong the tank's lifespan, and improve heating efficiency. The service usually costs between $ 150 and $ 350.
Cost Factors for Flushing a Water Heater
The cost for a professional flush of your water heater typically ranges from $80 to $150. This service includes a comprehensive evaluation by our skilled technicians, who will ensure that every component of your water heater is functioning perfectly.
Understanding the value of scrap water heaters can significantly impact your bottom line. With steel prices ranging from $0.05–$0.08 per pound, a standard residential tank can yield $10–$25. Larger commercial units may bring in $50 or more. Staying informed about market fluctuations is crucial for accurate estimates.
It typically takes 10 to 45 minutes to drain a 40-gallon hot water tank using gravity. The exact time depends on your home's water pressure, whether the tank has built-up sediment, and the size of the drain valve.
If you need to flush sediment out of your water heater more than once a year, contact a professional plumber for assistance. The heater may need servicing or replacing. You should let a professional flush the tank if it has not been drained for three or more years.
"Once a tank is 10 years old or more, sediment can become so compacted that flushing may actually cause leaks or clogs as debris breaks loose.
If a standard showerhead is fitted, it will use around an extra half a gallon each minute, accounting for a 25-gallon emittance every 10 minutes, or 50 gallons throughout a 20-minute shower. *1 gallon = 4.54 litres.
To drain a water heater quickly, turn off its power and water supply, open a nearby hot water faucet to let air into the tank, and attach a garden hose to the bottom drain valve. To drain it much faster, carefully open the Temperature and Pressure (T&P) Relief Valve.
A 10-minute shower typically uses 12 to 25 gallons of hot water, depending on your showerhead's flow rate and how hot you keep the water.
A 40-gallon gas water heater typically lasts 8 to 12 years. However, the exact lifespan depends heavily on your local water quality, your household's daily usage, and how consistently the unit is maintained.
Copper is the leading choice in scrap metal values today. In early 2026, current prices for premium grades have surged well past $4 per pound, making it highly lucrative for waste management operations.
Naturally, tanks that heat more gallons of water typically have a higher price point, so the larger the tank size, the more you can expect to pay. For example, the average 40-gallon water heater installation cost runs between $1,000 and $2,500, while its 80-gallon counterpart runs between $2,650 and $3,910.
Traditional tank water heaters last 8 to 12 years, while tankless models typically last 15 to 20 years. Lifespans vary greatly depending on water quality, unit design, and whether you perform regular maintenance like flushing the tank and checking the anode rod.
The Home Depot offers traditional water heater tanks and modern tankless units, both powered by either gas or electricity. Depending on your selection, the average cost for standard tank installation is generally between $1,600 to $2,400. Tankless installation can range from $2,400 to $5,400.
Flush your traditional or tankless water heater once a year to prevent harmful sediment and mineral buildup. If you live in an area with hard water or have heavy daily hot water usage, experts recommend flushing it every six months.
A: Traditional tank water heaters usually last 8–12 years, while tankless units often last 15–20+ years. Q: Should I replace my water heater if it's over 10 years old? A: Often yes. Even if it still works, the risk of leaks and sudden failure increases significantly after 10 years.
In short, draining removes water. Flushing removes sediment, and that makes all the difference.
As long as pressure is above 40, it stays consistent for as long as you need. If you water heater runs on both electric and gas run them together when you take a shower and you will get maybe a full 10 to 12 minutes of a shower out of a 6 gallon water heater annual want to run it on a slower stream.
Flushing a water heater removes sediment to improve energy efficiency and prevent clogs, while draining simply empties the tank. Plumbers recommend flushing every 1 to 3 years. Caution: If your tank is over 10 years old and has never been flushed, sediment may be sealing micro-cracks, and flushing could cause leaks.
Generally, it takes about 30 minutes to an hour to drain the average 50-gallon water heater completely. However, the time may vary depending on the size of the tank and the amount of sediment present. After the water heater tank is empty, it's time to flush it.
Only heat the hot water twice a day
Try heating the water for an hour in the morning and an hour in the evening. Start the water heating about an hour before you need it. For example, if you shower at 08:30, start heating the water at 07:30. If you wash up in the evening at 19:30, then start the water heating at 18:30.
The 4-minute shower rule is a sustainability and cost-saving initiative advising people to limit their daily showers to four minutes or less. This practice helps conserve water, reduce energy used for heating, and lower household utility bills by limiting consumption to approximately 36–40 liters (roughly 9.6–10.5 gallons) per shower.
Water Heater Size
Your tank size is the most significant determinant of how long you can have a hot shower: 30-gallon tank: ~5–7 minutes of hot water. 40-gallon tank: ~8–10 minutes. 50-gallon tank: ~10–12 minutes.
Older toilets (pre-2000) can use up to 13 litres per flush. Modern single-flush toilets typically use 6 litres. Dual-flush toilets offer a choice: typically around 4 litres for a half flush and 6 litres for a full flush.