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It is called the meniscus.

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Q: What is the dip in the water in a test tube called?
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Related questions

Where is the dip tube found in plumbing?

Water heaters


How do you detect chlorine in water?

you'll need a water test kit or dip stick test.


What is the purpose of the dip tube in a water heater?

it puts cold water in and pushes hot water to the top


What does a bad dip tube in water heater look like?

most dip tubes when they go bad don't look like anything at all because there's nothing left to it. when you pull out your cold side nipple which is 3 to 4" inches long then you can pull out your dip tube and inspect it. If your dip tube has cracks in it or holes then I would replace it . Most dip tubes in a water heater tank should be long enough so that the bottom of the dip tube is within 4 to 6" of the bottom of the tank.


How do you replace dip tube on hot water heater?

Take cold inlet water pipe off tank. The dip tube sits below the fitting joining to the tank on the cold inlet side. You can pull it out and replace it.


Why is there a constant sound of water flowing to hot water tank?

Dip tube failure approachng fast


Is the hot water tank going if you run out of hot water in three minutes?

Could be several things, including a bad element or thermostat, but I think you may have a broken dip tube. The dip tube carries the new cold water to the bottom of the tank, if it breaks off the new water enters at the top where the hot water is exiting. It quickly mixes and will lower the temp of exiting water considerably. The dip tube is located inside the cold water inlet of the water heater.


What is the name for the dip in water table caused by pumping?

A dip in the water table caused by pumping is called a cone of depression. The land surface above the cone is called the area of influence.


What is the meaning of toe in the water stuff?

To dip one's toe in the water is to test something out, cautiously, and without committing yourself to it.


What is the name for a dip in water tables caused by pumping?

A dip in the water table caused by pumping is called a cone of depression. The land surface above the cone is called the area of influence.


What do you look for when a duel element hot water heater does not keep water hot?

The question doesn't contain enough information. When you open the hot water facet, does the water come out hot, but cools quickly? If so then you probably need to replace the dip tube. The dip tube insures that the cold water is injected at the bottom of the tank as the hot water is with drawn from the top of the tank. Dip tubes are mounted in the cold water input side at the top of the tank. some times dip tubes break off at the top so when you start drawing hot water from the top of the tank the cold water is injected into the top of the tank and this makes your hot water cool quickly. The water will come out hot, but will cool quickly. Normally when the cold water is injected into the bottom of the tank (through the dip tube) it will displace the entire tank full/column of hot water out through the top of the tank before the cold water gets to the top.


Why does your hot water heater bubble when faucet is turned on?

Sounds like the anode is giving up the ghost or a faulty dip tube