PROBLEM:
SCALE DEPOSITS
As water is heated in a tank, minerals precipitate out and collect as sediment on the bottom. As this scale builds up in a gas heater, it slows the heat transfer from flame to water, causes overheating and increased energy use. The excess heat can damage the glass lining and weaken the steel. It often produces a sleepdisrupting popping or rumbling noise. When sediment collects in electric heaters, it can cause element burnout. Removing the sediment barrier also allows the sacrificial anode clear access to the tank’s bottom, resulting in better protection.
CURE:
Replace the conventional straight cold water inlet with a tube which has a curve at the end, and replace the tank’s original (usually plastic) drain valve with an easily operated brass ball valve. As water enters the tank through the new tube, its swirling motion lifts scale off the bottom and flushes it out the large opening of the brass ball valve. (Some heater manufacturers void their warranties if scale buildup is the cause of tank failure. Others facilitate flushing by adding various expensive devices to reduce sediment buildup).
Though it is easier to move sediment out the drain valve at the bottom than it is to move it off the bottom and out the top, keep in mind that if adequate water flow is not present no removal system will work properly.
The surest way to remove sediment is with periodic flushing and routine maintenance. Set your customer on a flushing and maintenance schedule to protect their investment.
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