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.
The cast of Perforations - 1992 includes: Diana Lea as Carol Webster
perforations
perforations
Wood vessels are the thin "tubes / pipes" that transport the water in the stem (trunk) of a woody plant. They consist of many linked empty cells, the wood vessel members. These have perforations in the ends and link toghether to form long tubes, the wood vessels. Wood vessels carry water and minerals from the roots of a woody plant (a tree, for instance) to the leaves.
30020
2000 perforations in a tea bag
A dipper would dip dip as much as it want if a dipper would do dip.
The brick with holes are called as perforated bricks. The holes are otherwise called as perforations. The perforations may be circular, square, rectangular. Generally these type of bricks are light weight and have high thermal insulation.
It depends. Many early stamps were issued without perforations, requiring scissors to separate them. Others were intentionally printed both with and without perforations. You will need to use a catalog to determine the specific stamp.
Steeplechase
The perforations enable separation of the sheets off the roll.