11.   Turn on the inlet valve and go to the open upstairs faucet.

12.   When locating an inlet valve, consider that interior walls may have obstructions, like plumbing and electrical lines.

13.   You can often correct this problem by shimming up the end of the radiator that is opposite the inlet valve so that it slopes slightly toward the inlet valve.

14.   The Squalus sank when water inlet valves opened without tripping alarms in the control room.

15.   This down-stroke of the piston, which is called the induction stroke, is timed to coincide with the opening of the inlet valve.