anything higher could cause problems. It allows me to keep my water heater at 140 degrees but will mix the water exiting the tank with cold water so that my hot water can be delivered to my tap at 120 degrees to prevent scalding. The low is on 140, and the high 180. Is it the relief valve or themostat or both? If you only set one of them at a different temperature, the other one will always be trying to heat up because of the temperature difference in the upper and lower water. I can’t believe that I’m setting my water heater temperature too high for so many years without something needs to be fixed. Remember Dr. Marc Edwards of Virginia Tech who helped prove that Flint Michigan had a lead problem in their water supply? Not only is this a good guide….that’s my new water heater in the picture! The Rheem MR50245 Marathon Tall Electric Water Heater is supplied with a limited lifetime warranty. According to Dr. Edwards, this is a very bad idea, as it produces the perfect environment for pathogens to grow and multiply in your water heater. The water is not that hot, and does not stay hot for that long. When you say 120 or 140, do you A is 120 degrees & B is 140 degrees? Replace the insulation and panels, then restore power. 3- Setting temperature at A, water temperature is below 100. Set the temperature of the water reservoir (hot water heater) to 140°F but deliver the water at 120°F by way of a mixing valve. That’s not why we did it, though. Over the last eight years we've documented hundreds of home improvement and DIY craft projects along with many tool and material reviews. At 130 degrees, any Legionellae would die within a few hours so if that’s the regular temp, there shouldn’t be a need to go any higher since as the risk is super low. However, the best setting for you could vary based on a few factors. The Consumer Product Safety Commission (CPSC) recommends setting the water heater at no more than 120 degrees Fahrenheit (49 degrees Celsius) to prevent scalding. This means that you can be sure this model will truly go the distance. What is wrong? Apparently the.water got too hot on high and the relief valve went off. Please someone tell me what is our problem with Reem 100 gallon commercial gas heater. It would be rare on a new water heater but that’s the first thing I’d check. (snowing as I type). i live in central arkansas and we happen to have great water here; but i do keep my gas water heater at 140. i thought about 150 for a while there, but i dont want to pay the bill for the extra heat i dont need. Appreciate the comment. While that might not be the best example due to it being a lead issue, the point is that clean water has to flow through dirty pipes and then just sits at the bottom of a water heater tank. A temperature between 120F and 125F is ideal for most situations. Normally this cold water goes to the bottom of the tank via dip tube but if the tube is broken, the cold water would refill at the top which is where hot water is normally taken from. Water heaters are factory set at OSHA recommended levels, around 140 degrees. If you are running out of hot water when taking a shower, you may want to turn the temperature on your electric water heater up.Increasing the temperature on your water heater will increase your electric bill but only in the slightest. This has been a GREAT help. Adjusting Electric Water Heater Temperatures. That will kill off most of the bacteria. What could be the cause of this? Thank you for provided a wise, practical, “middle ground” solution. How can I tell if the two elements are actually coming on, and turning off, at the same time? This article series describes the various controls used on different types of water heaters and explains how each control is used to set domestic hot water temperature. Place a thermometer in a glass of hot water, ours reads 130 degrees recommended for baths, dishwashers. You should never set a residential hot water heater to 150 degrees. Water heaters are typically set at 120 degrees. It could literally be a potential life saver. You drink cold water anyway. Thanks for adding that in, Todd! Not a problem….the interesting thing is today most people are told to put their water to 120 F yet building code officials frown on it. And you got that stacking that happens, that makes your water heater very efficient. THE TOOLS: You will need a phillips-head and a flat-head screwdriver. STEP 4: REMOVE THE INSULATION behind each cover door to reveal the thermostat behind it. I also add sodium hypochlorite, a table spoon in the water a wash dishes with, and let to stay for 15-30 minutes before washing. Most electric hot water heaters have two thermostats, on the thermostats there is a temperature setting dial. If water temperature fluctuates below the set temperature, check for failed heating elements and thermostats. I’m fairly sure you wouldn’t save energy, since the one element would have to work harder to make up the difference of the other one being set lower. Thermostatic mixing valves also mitigate against the dreaded “flush flash.”. Different brands of gas water heater control valves may have different labels. I live in a 22/unit Condo Association and about a year ago, we got a new hot water heater (Rheem-Ruud Universal Commercial Gas Water Heater). The U.S. Department of Energy recommends the 120 degree-mark for both maintenance and savings purposes. I raised the temperature settings an equal amount on both thermostats until I got 130 degrees at the faucet. It scalds us even on pilot! Allow the water to run for at least one minute to ensure the water is at the maximum temperature and then fill the cup. How should this be addressed? STEP 2: LOCATE THE TWO THERMOSTAT COVERS – one at the top and one near the base of the water heater. Save my name, email, and website in this browser for the next time I comment. Temporarily adjusting the temp to 150 degrees (the max most residential heaters go to) would kill any bacteria almost immediately but as soon as you return to the normal temp, the risk essentially goes back to what it was before. However, there is less danger of bacterial growth in smaller domestic hot water tanks. But I didn’t have to go digging around for ours; they were right there behind each door, so I’m betting yours only needs one. Installed just over year ago in apartment complex, new one given me nothing but problems. However, there is less danger of bacterial growth in smaller domestic hot water tanks. Instead, the thermostat is marked with temperatures or heating ranges. Testing Your Water Temperature Fill a glass with hot water. I have had it for more than a decade.
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