Hot water getting pulled into cold line

Get in the shower in the morning and the water would be scalding hotno cold water because the hot water had forced its way over to the cold water line. If the slower flow continues but stays HOT the cold water shut off valve is defective and the test will not be valid.

We get hot water for a minute or two out of the cold faucet and hose bib closest to the water heater.

Hot water getting pulled into cold line. Hot water from cold line. Tburd OH I get hot water coming out of the water heater back into the cold water line. When I turn the cold faucet on it turns hot very hot before going back to cold then stays cold.

When it is unused for 15 - 20 minutes the hot water forces its way back up the cold line from the tank and will do it again. If you cannt live with the hot water delay try the shark bite check valve - you dont need to solder just cut and insert in the correct direction - minimally it will keep the cold from going up the hot even if it prevents the hot from returning down the line thus the delay returns. We call it Free Hot Water.

Here in SoCalifornia it even applies to buried cold water lines. If you have hot water circ-pump with comfort valve than the valve pumps hot water into cold to assure instant hot water in your bathroom. Then when you turn cold water ON you will get this hot water out of cold faucet 3.

If so and the lines are close to each other and uninsulated its entirely possible to have the hot line heat the cold while the water is sitting. Their isnt anything you can really do about it besides insulate the pipes get them further away from each other or remove the re-circulating loop. Turn them to the cold side but not on.

One by one to use the process of elimination to discover which one or more. You also may have more than one water heater and it is piped where they individually feed the hot line. You also may have a flutter in the actual faucet that causes the hot or cold water to stutter.

Mixing valves can cause this a typical culprit can often be found in a washing machine or also a single handle plumbing fixture they malfunction and allow the hot to pressure into the cold line. That is if you get hot water constantly out of the cold side the question of why is it warm at first is pretty normal stuff basic physics. We have a problem with hot water getting into the cold line only when the circ pump is on.

We get hot water for a minute or two out of the cold faucet and hose bib closest to the water heater. Our plumber tried to solve this problem by adding a check valve to the circulation pump adding an expansion tank to the cold side of the water heater along with a check valve on the cold side. So you may be feeling some conductive heat that comes from the hot water in the water heater itself could be making that pipe warm.

But if you go farther down the line youre going to feel that its cold again. It goes in cold and comes out hot but the fitting right around the top might feel like its a bit warm. But thats only because of the conductive heat of the water in the water heater.

A friend of mine had one of those and they would use it at night then leave it connected. Get in the shower in the morning and the water would be scalding hotno cold water because the hot water had forced its way over to the cold water line. You find that check valve on your hot water heater and replace it.

That will take care of your problem. This is something else that an experienced plumber will take into account when determining why you might be experiencing hot water from a cold tap. Other issues with expansion tanks may include a malfunctioning thermostat in the immersion heater when it fails water may boil over into the cold water tap meaning that your plumbing systems cold water.

With a demand hot water system a pump is attached to hot and cold water lines under the kitchen or bath fixture that is farthest from the water heater. At the press of a button the cool water that normally runs down the drain is recirculated back to the water heater through the cold water line and water from the hot water heater is brought to the faucet. Once the heater is warm usually the water will not expand nearly as much as it will when heating from 55F to 140F the first time.

Also if you are sure the hot water heater is full of water you can let it heat with the pump off then it will have less pressure inside the tank to push back into the cold water lines. LG Washer when set to cold or tap cold will pull from the correct cold water line but all the water coming in through the hose is hot. If I choose the hot setting it will pull hot water from both lines.

Any idea what could cause this. I live in Massachusetts and weve had quite the cold spell lately if that could have an effect. Right now I am experiencing hot water through my cold line.

I have a separate hot and cold line feeding my condo from the main building water sources. If I turn off the cold water line and turn on my cold faucet at the bathroom sink which is only fed by the cold water line I get no water. It is normal for the incoming cold water pipe to get a little warm due to convection that is hot water rising in the tank.

Also copper piping is a good conductor of heat. Many modern water heaters have built-in heat traps to limit the migration of hot water. However hot water five feet back on the supply line is not normal.

While the cold water cistern is designed to accommodate modest levels of hot water entering via the expansion pipe things can go wrong and in some cases there may be hot water in the cold water tank. In such circumstances the temperature of the water can range from unusually warm to scalding hot. Lets take a look at the possible reasons why.

Short feed line When it doesnt reach the water air can enter the line especially during droughts. Air only in hot water pipes. If only hot water pipes are filled with air this means that its coming from your water heater.

This is especially true for well-fed systems in Orange County where the heater hasnt been cleaned for some time. Should the water continue to flow but at a slower than normal rate you have one of two conditions. If the slower flow continues but stays HOT the cold water shut off valve is defective and the test will not be valid.

Replace the cold water shut off valve and continue the test. If the water turns COLD you have cold water crossing over to the hot. The cooled water that is pumped into the cold-water line pushes water back into the tank for reheating.

When hot water reaches the farthest point of use a temperature-sensitive switch shuts off the pump. Although this system works well you do end up with some warm water in cold-water lines when the pump has been running.