Natural Gas Water Heaters . There are several reasons you would want to fill a hot water heater: the hot water heater could have had a leak and the water level is low; you might have had repairs done for which you needed to drain the hot water heater; you may be flushing the hot water heater as part of regularly scheduled maintenance; … Hot water expands and requires relief. … If the valve is on top of the tank, empty … Not enough hot water or water not hot enough. Faulty Dip Tube Problem . Turn on a hot water faucet somewhere in the house to a dribble to prevent a vacuum from forming inside your hot water tank. Your tanks are never completely full. Install an Anode rod. It sounds like my hot water tank is constantly filling when the heating and hot water are off. Identifying the Cause and Solution for Common Hot Water Heater Problems. It went in easily, worked well, and was cheap. If after cooling and putting back on it overflows … Just started recently - sound like a 'whirr' when hot water tank fills up after hot taps used for a few minutes or after a shower. Source(s): central heating expansion tank fill hot water: https://shortly.im/KkQlm. Freezing. And when cold water enters the hot tank it can produce condensation on the outer surface of the tank. Reply. Read on to find out what cloudy water means for you! Closed the main inlet water valve, drained the water at both bathrooms sinks. Cracked open the bottom drain valve and started draining the tank. Well, when a large amount of hot water is used, cold water enters the tank to fill it back up. If your water heater is producing hot water, but not enough of it, your unit could be too small to meet the household's hot water demand. When that condensation rolls down the side of the water heater and hits hot surfaces (such as parts … This article series gives diagnosis & repair advice for well or water … Problem: No Hot Water. Some people swear by emptying the tanks while their caravan sits in storage between holidays. At any rate I can hear the sound of water moving. If for some reason it stops conducting its purpose, the cold water will remain on the top of the tank, that way exiting the tank before the hot water, so you will always get lukewarm water when using the hot water tap. BrianW78, 25 Sep 2019, in forum: Plumbing and Central Heating. Inside, the tank … This malfunction has proven very dangerous since in case it fails, you will probably have to replace the whole tank. Boiler firing up randomly and hot water tank constantly hot. I think also the header tank may be filling/emptying. Blair thorburn . You should do this annually, and at least twice per year if you draw your water supply from a well. If the expansion tank had too much water in it when it was cool then as the system heated the volume expands and excess water will overflow if the thermal expansion is larger than the ullage voume. A hot water expansion tank is a small metal tank (usually 2-5 gallons) that’s installed just “downstream” of the cold water inlet valve that feeds your residential water heater. Hot Water Problem #5: Your hot water system makes strange noises. (Think of how a cold glass of water beads up on a hot summer day.) Make sure to fill the tank with water if you drained it beforehand because if not it could damage the tank pretty badly. Bought a new valve and ballcock and installed, problem was still continuing!!! Another possible reason your hot water tank isn’t hot is a damaged or disconnected dip tube. The water heater should have 75 percent of its capacity as hot water. Fill the bucket with hot water from your tub spout with water running through the thermometer. January 19, 2018 at 8:21 am . If the pilot light goes out, your burner can’t heat any water. It will then corrode the rod instead of your tank. Aug 16, 2015 #2 jneil said: I recently replaced the ball valve on my cold water tank in the loft but ever since then my … I would be interested to hear the outcome of yours. Hello – we have a similar sounding problem. Allow the tank and the vent pipe at the top of the tank to cool for two hours, or until it is cool to the touch. There can be several causes to the same problem. If hot water is coming out of the overflow pipe, turn the system off, wait for the water to cool right down and set the float valve to allow less water into the tank. It can also be common when the pipes under the floor and to no … But it’s really tricky to … If the valve is on the side of the tank, this should be about 5 gallons. Turn the water heater control knob to the "Pilot" position. I've just noticed that the hot water tank in my parents house is always filling, I'm not sure how long it's been going on for as no one lives there any more. There will always be that bit at the top that doesn’t fill up and there will always be air bubbles in the water. That’s not uncommon, as these appliances will pull available water from your system and thus change the amount of either cold water or hot water running to your shower. For example, when a toilet flushes, it will pull cold water to fill up the tank. Propane Water Heaters. 1 decade ago. Gas tank water heaters come in short and tall styles across a range of BTUs, capacities and venting options. Constantly monitor the hot water heater while flushing and refilling. Many … In this episode of Repair and Replace, Vance shows how to troubleshoot leaks in a gas or electric water heater. Bangs, pops and gurgling sounds can be caused simply by the expanding and contracting of metal parts. The noise seems to be from the cold water pipe that is filling up the hot water tank. 0 0. If You find the hot water tank overflow pipe dripping at some point, we will have to come to an assumption that there is some sort of a defect in your overflow valve. Unfortunately, propane water heaters aren’t very cut-and-dry (and not just because they hold water!). Water Tank Noise Diagnostic FAQs. This is increased in older hot water units as mineral and hard water builds up on the inside of the tank. But still, you cannot come into a solid conclusion as yet, since it is just an indication of a malfunction in your overflow valve. The image shows the tank going all the way from hot to cold, but if you have a water heater with a good recovery, the water heater will be able to keep heating the water, and prevent the water … Messages 828. Water tank noise & sound diagnostic FAQs: This article provides answers to frequently-asked questions about how to diagnose noise problems with the water storage tank or water pressure tank including hissing, gurgling, bubbling, or clangs, bangs and clashes at or near the water tank. Since that time, I've installed at least 30 such systems, both perimeter baseboard and radiant floor … Any ideas? For example, a 40-gallon water heater is properly sized for a demand of 30 gallons. Note how many times you can fill the bucket before you see a 20-degree drop in temperature. We always had some noise with the old valve but I must agree this is much louder. The pipe that is all by it’s own and comes gravity fed from the hot water storage tank above, is known as the hot water cylinder feed or cold water supply to the cylinder. Are you worried there could be something in your water? If hot water in the toilet tank isn’t a problem from the get-go – meaning you’ve had a perfectly normal toilet until recently – chances are the problem is a malfunctioning flapper or a bad fill valve. Insulate the hot water pipes running from the water heater to the distant faucet. When bubbles stopped I knew water was below that element. Cracked open the upper element till I could hear bubbles at the O-ring seat, meaning water was still above that line. A water heater is always full of water, it does not empty, then fill again, the red in the tank represents hot water in the tank, the light blue represents cold water coming in to the tank. You can also test your showerhead’s GPM rate. You may have an expansion tank to handle this or you just have an open vent that runs up and fills into the cold water tank in the attic. In the feed and expansion tank, there will be a float valve (another name for ball valves) which controls the flow of water into the tank. 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