Most home owners are probably capable of installing shock-absorbers on clothes washer valves if they are capable of replacing their clothes washer hoses. Special, extremely easy to install water hammer arrestors usually only require one additional hose type connection.

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Much in the same way high blood pressure can be “the silent killer”, high water pressure and/or water hammer can cause major damage.

I hope the communication skills I learned talking to customers and other plumbers for over forty three years will help you. If I can convince you to make smart decisions, I have done my job.By Mike Quick / MikeQuick.com

2. Wattage: The wattage is not listed on the label, but the electrical current draw is listed at 3 amperes. 120V × 3A = 360W

Shock absorbers (water hammer arrestors) installed close to fast closing valves, provide trapped air that absorbs the bounce back energy flowing back from the valve. Much like the shock absorbers on a car absorb energy traveling up from sudden impact, water hammer arresters capture the energy flowing back from a fast closing valve.

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Capturing bounce back energy also helps to protect supply connections, pipes and water heaters. Water hammer seems to increase risk of premature plastic pipe failure, supply line failure to toilets and faucets and other connection failures. I also think hammering increases the frequency of pinhole leaks in copper water pipe. I think water hammering contributes to water heater heat trap problems, safety valve leaks and could even contribute to premature water heater failure.

Talking to customers for more than forty three years, has taught me that it isn’t enough to clearly explain plumbing dangers. I have to convince people to take the necessary steps to prevent dangers.Most people get alarmed when they hear banging noises in their pipes but find it difficult to believe they have a problem when everything sounds normal.

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Homes that rely on a pressure reducer to control high water pressure coming in from municipal water mains must make sure the pressure reducer is working properly. Pressure reducers and other causes can also create banging and other strange noise.

Our appliance and electronic energy use calculator allows you to estimate your annual energy use and cost to operate specific products. The wattage values provided are samples only; actual wattage of products varies depending on product age and features. Enter a wattage value for your own product for the most accurate estimate. Utility rate data source: EIA Average Retail Price of Electricity.

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Monitors are especially useful for finding the amount of kWh used over any period of time for devices that don’t run constantly, like refrigerators. Some monitors will let you enter the amount your utility charges per kilowatt-hour and provide an estimate how much it cost to run the device since it was plugged into the monitor.

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Electricity usage monitors are easy to use and can measure the electricity usage of any device that runs on 120 volts. (But it can’t be used with large appliances that use 220 volts, such as electric clothes dryers, central air conditioners, or water heaters.) You can buy electricity usage monitors at most hardware stores for around $25-$50. Before using a monitor, read the user manual.

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Water hammering and added stress contribute to premature failure. Fill valves on toilets, faucets, solenoid valves, pressure reducer valves, and other water control devices are exposed to a very stressful shock each time energy bounces back uncontrolled from a fast closing valve.

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I always strongly recommend people find a trustworthy plumber to do all plumbing. If you are determined to install your own water hammer arrestors for a clothes washing machine, I hope you will read my “Warnings and Tips Concerning Clothes Washer Supply Lines” article.

In addition to providing information on the energy consumption of your appliances, these monitors help you understand where and when you use the most energy, allowing you to develop strategies to reduce your energy use and costs.

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People don’t hesitate to spend money to make their pipes quiet. In this article, I hope I can convince you to be alarmed if there are no water hammer arrestors (shock absorbers) on the supply hoses to your clothes washer. Silent water hammer is worse than noisy hammering.

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Of course, the higher your water pressure is, the more dangerous the water hammering will be and the more it is likely that you will hear it. Some people stop noise by replacing a defective pressure reducer but fail to realize that the useful life of the new pressure reducer will be shortened by the silent-but-still present water hammering.

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To find out how many watts of electricity a device is using, just plug the monitor into the electrical outlet the device uses, and then plug the device into the monitor. It will display how many watts the device uses. If you want to know how many kilowatt-hours (kWh) of electricity the devices uses in an hour, or a day, or longer, just leave everything set up and read the display later.

Top quality plumbers, many years ago, used to make water hammering arrestors out of short pipes and caps. The problem with those type arrestors is that eventually, they would get water logged. Modern water hammer arrestors use rubber to separate the shock absorbing trapped air from water. Water hammer has always been around, now, better, easy to install arrestors have replaced capped pipes.  If you need more convincing you can buy a pressure gauge with a hose connection and make some observations when your clothes washer solenoid valve closes. Usually it will be easy to see dramatic needle jumps on a pressure gauge even if it is attached on an outside faucet located far from the clothes washer.

When fast flowing water stops quickly, the energy of the flowing water quickly bounces back throughout the plumbing system. This shockwave creates a hammering effect in the water supply system in the home. Usually, if there are any loose pipes or any loose parts in the water supply system, banging (hammering) will be heard when uncontrolled shock waves travel from a fast closing valve. Unfortunately, uncontrolled shock waves can also create loose pipes and loose parts.

How manywater hammerarrestors do I need

It is best to have a shock-absorber on every fast closing valve. They are recommended and are available for clothes washers, dish washers, ice makers and even toilets.

Many appliances continue to draw a small amount of stand-by power when they are switched "off." These "phantom loads" occur in most appliances that use electricity, such as televisions, stereos, computers, and kitchen appliances. Most phantom loads will increase the appliance's energy consumption a few watt-hours, and you can use a monitor to estimate those too. These loads can be avoided by unplugging the appliance or using a power strip and using the switch on the power strip to cut all power to the appliance.

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If there are no shock-absorbers (water hammer arrestors) on the clothes washer shut-off valves, there is a water hammer each time the washing-machine solenoid (fill valves) stop water flow (whether you hear it or not). This shock wave frequently causes premature plumbing failure.

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If you want more detailed data on your home's energy use (as well as the ability to measure the energy use of 240-volt appliances), you might consider installing a whole-house energy monitoring system. The features of these systems vary, and the cost and complexity depends on the number of circuits you want to monitor, the level of detail of the data, and the features available. The monitors are often installed directly in the main breaker panel of the home, and some may require an electrician to install. Some monitors must be connected with your home's wireless network and data is viewed on a computer or smartphone, while others come with a dedicated display.

Determining how much electricity your appliances and home electronics use can help you understand how much money you are spending to use them. Use the information below to estimate how much electricity an appliance is using and how much the electricity costs so you can decide whether to invest in a more energy-efficient appliance.