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water causes the minerals to separate and fall to the bottom of the tank. Usually this sediment build-up is made of calcium carbonate. One sign of sediment build-up is a sulfur (or rotten-egg) smell around your water heater.
With gas water heaters, sediment problems may cause the entire heater to become noisy while on.
water heaters, sediment can cover the lower heating
element, which causes a significant drop in the amount of hot water the water heater can produce. Removing the heating element, and soaking it in an acid de-scaler solution (ie: CLR etc) can remove the calcium buildup, and prevent failure of the element due to local overheating
You might also install a low-watt density heating element in the tank. The low-watt density heating element has twice the surface area as a normal heating element; this means the low-watt element doesn’t have to use the high temperatures that a normal element does to achieve the same water temperature in the tank.
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