| 137 / | HD | FLUID HANDLING |
| 386 | DF | LIQUID LEVEL RESPONSIVE OR MAINTAINING SYSTEMS {11} |
| 409 | DF | .~ By float controlled valve {11} |
| 429 | DF | .~.~ Rectilinearly traveling float {1} |
| 430 | DF | .~.~.~ Float co-axial with valve or port {3} |
| 433 | | .~.~.~.~ Float rigid with valve |