It's apparently a slang name in some parts of US for the anode of a H/W heater. This is a long rod that fits into the top of a heater to attract metallic impurities in the water.
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.
IN THE DIP STICK TUBE.....
Water heaters
how do u change the oil dip stick on a 1999 mercury mystiqe
It is called the meniscus.
you pour the fluid down the dip stick tube.......
in the dip stick tube
Down the dip stick tube
in dip stick tube
In the dip stick tube .
The tube runs down and goes into a hole on the block.
It means to take a bath tube bath