Flushing a hot water heater costs between $75 and $350 for a professional service, depending on your system. If you decide to tackle this maintenance yourself, you can expect to spend about $10 to $30 for basic supplies like a garden hose or flushing solution.
Cost Factors for Flushing a Water Heater
The cost for a professional flush of your water heater typically ranges from $80 to $150.
Yes, flushing a water heater is worth it if your tank is relatively new (under 3–4 years old) or if you have heavy sediment. However, if your older tank has never been maintained, flushing it can actually dislodge sediment that was sealing small leaks, potentially causing a broken drain valve or a leak.
It takes about 30 minutes to 60 minutes to flush the water mains on each street.
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.
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.
You should run a new water well continuously for 24 to 72 hours until the water runs completely clear. The duration depends on the geology and the volume of sediment.
Top 5 Water Wasters in Your Home
A 50-gallon water heater typically takes 30 to 45 minutes to drain completely. The exact time depends on your home's water pressure, the size of your hose, and the amount of sediment buildup in the tank.
If the gas burner or electric heating elements come on during the flushing process, the water heater can be damaged, requiring repair or replacement. Some manufacturers will recommend turning the gas off completely during this process, others may recommend setting the gas valve to the “pilot” or “vacation” setting.
Water Heater Lifespan
If your tank water heater is more than 10 years old, it may be time to consider replacing it. With proper maintenance, a tank water heater tank should last six to 12 years. A tankless water heater can last for more than 20 years. Check your water heater's warranty for the most accurate timelines.
In short, draining removes water. Flushing removes sediment, and that makes all the difference.
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.
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.
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.
The #1 water waster in your home is the toilet.
A leaking toilet can waste 15,000 gallons of water a month.
What is Average? The water industry estimates that an average person uses 3,000 gallons of water monthly, so a family of 4 would use 12,000 gallons for bathing, cooking, washing, recreation and watering. But a lot of factors come into play when calculating average use.
If I use some average values a 30 minute shower could easily generate 75 to 100 gallons which works out to be about $4 to $5 total per shower.
The "135-degree rule" in plumbing states that the total (aggregate) horizontal change in direction for a drainage pipe—specifically trap arms—cannot exceed 135 degrees between the P-trap and the vent. Exceeding 135 degrees (such as using three 45-degree bends or a 90 and two 45s) requires a cleanout because sharp turns hinder flow and cause clogs.
If your toilet needs power to refill, like if you rely on well water, it can probably only flush once or twice. You could manually refill the tank of most toilets in this case, however, so it might be worth storing water if you rely on a well pump.
Well drillers identify when they hit water by observing an immediate surge of water or muddy spray from the wellhead, sudden thinning of drilling fluid (mud) returning as clear water, wetter or darker rock cuttings, and a noticeable drop in resistance or smoother drilling action.
A bath generally uses more water than a standard 10-minute shower. However, exact usage depends on your bathtub's size and the flow rate of your showerhead.
Toilet and faucet leaks
The most common cause for a high water bill is running water from your toilet. A continuously running toilet can waste up to 200 gallons a day or more depending on the volume flow down the drain.
When your hot water only lasts 15 minutes, it usually means your water heater is struggling to heat water fast enough or the hot water is mixing with cold water. The most common culprits are a broken dip tube, a faulty lower heating element (on electric tanks), or excessive sediment buildup.