11.   Overfill protection devices are installed inside the tank and shut off the intake valve when liquid propane being added to the tank gets near the top.

12.   The intake valve closes, sealing the chamber.

13.   To treat stains under water, drain the toilet first by closing the intake valve to the tank and flushing.

14.   Wallace is an eccentric fuddy-duddy with his knit vest and wide mouth whose main purpose seems to be serving as an intake valve for his beloved cheese.

15.   Clusters of the tiny, rapidly multiplying zebra mussels have clogged water intake valves in several large U.S. cities along Lake Erie and the Ohio and Mississippi rivers.

16.   The tactic should put an end to clogged intake valves and water treatment plants coated with the shellfish, says Spelt.