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Eack HWT has an overpressure device mounted on the tank. It sounds like this one is leaking. Check the temperature setting on the tank to see if it has been changed. A HWT is not supposed to be operated at more that 50 PSI. Check the pressure reducing valve where it enters the house to see what the pressure reads.

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Q: Water leaking from top of hot water tank?
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Continue Learning about Natural Sciences

Will a water heater drip when heating?

If you are talking about a hot water tank then the answer is no. If it is leaking from a fitting, it just needs to be tightened. If you can not tell where the leak is coming from, the water leak is the first sign that the tank is going to need replacing in the not to distance future.


What is the anode in a gas water heater?

The sacrificial anode in a Hot Water Tank takes most of the rusting problems away from the tank itself, hence the word "sacrificial!" When the anode has finished its course of use, you will get rusting happening on the walls of your tank which leads to a wrecked and leaking hot water tank. Manufacturers do NOT want home owners to know about these anodes, because if everyone replaced them there would not be any hot water tanks to replace.


Does natural gas have anything to do with hot water?

Sometimes natural gas heats your hot water tank.


Why is your water tank not retaining hot water?

Assuming you are talking about a home water heater, there is a pressure relief valve above the hot water line - usually on a tee or an ell above where the hot water line comes out of the heater and usually leads to the floor and under the house. The valve is designed to relieve the pressure in the water heater when the water becomes too hot. The valve may have corroded and is stuck in the open position thereby releasing the hot water. You can feel the pipe that connects to the valve = if it is hot, it is leaking water; if it is cold, the problem lies elsewhere - maybe the thermostat could be set too low.


How long should hot water from a 40 gallon tank last?

That depends on how much water is drawn from the tank and how often it is drawn.

Related questions

How do you rectify leaking warm water from the overflow tube on your hot water tank?

Replace the pressure relief valve.


Can you drain a leaking hot water heater by running hot water in home?

No, you have to attach a garden hose to the fitting at the bottom of the tank. Often the tank will have sediment built up in it and the water will drain very slowly from this.


Why did your water heater make a knocking sound even when the hot water not on?

It is time to replace hot water tank before it starts leaking. Try and drain tank and see if that helps. It is rust that is poping inside tank. If your tank is over 8 years old i would just replace it


How do you stop pop off vaule from leaking?

Replace it or turn your Hot Water tank temperature down


How long does it take for hot water after lighting a hot water tank?

how long does it take for hot water after lighting water tank its gas?


Will a water heater drip when heating?

If you are talking about a hot water tank then the answer is no. If it is leaking from a fitting, it just needs to be tightened. If you can not tell where the leak is coming from, the water leak is the first sign that the tank is going to need replacing in the not to distance future.


Does the boiler heat the water at first then supply it to the hot water tank?

No, a hot water tank heats water by itself.


do they help with a hot water tank replacement ?

do they help with hot water tank replacement


Does the boilder or furnace heat the water at first then supply it to the hot water tank?

No, a hot water tank heats water by itself.


Why is the Gas hot water tank not hot for long?

The hot water tank might be undersized for your usage.


What is the anode in a gas water heater?

The sacrificial anode in a Hot Water Tank takes most of the rusting problems away from the tank itself, hence the word "sacrificial!" When the anode has finished its course of use, you will get rusting happening on the walls of your tank which leads to a wrecked and leaking hot water tank. Manufacturers do NOT want home owners to know about these anodes, because if everyone replaced them there would not be any hot water tanks to replace.


Get Help When You See Hot Water Heater Leaking?

A hot water heater leaking can mean that it's time to buy a new unit, but sometimes it only means that the water heater needs repair. The best thing to do when you see your hot water heater leaking is to give a plumber a call. Licensed, trained and certified plumbers work on water heaters all the time and can inspect yours to see if it needs replacement or repair. With a hot water heater leaking, you want to make sure you get help fast before the problem worsens. A small leak can quickly get bigger and could eventually lead to a ruptured tank.