dip tube

English

Noun

dip tube (plural dip tubes)

1. A tube in a boiler that directs incoming cold water to the bottom of the tank, to be heated.
   • 1999, R. Dodge Woodson, Plumber's Standard Handbook, pages 25–19:

     If the pilot light lights but continues to go out, replace the thermocoupling. If none of these methods prove fruitful, check the dip tube.