-- From April 20, 1999, to April 8, 2000, Alaska allegedly operated a Boeing 737 and two MD-80 jets with maintenance items improperly deferred, including a drain valve power circuit breaker and a stair light.
32.
These waterboxes on inlet side will also have flanged connections for cooling water inlet butterfly valves, small vent pipe with hand valve for air venting at higher level, and hand operated drain valve at bottom to drain the waterbox for maintenance.
33.
In the Space Shuttle the main oxidizer and fuel bleed valves were used after shutdown to dump any residual propellant, with residual liquid oxygen venting through the engine and residual liquid hydrogen venting through the liquid hydrogen fill and drain valves.
34.
Close the inlet valve that permits water to come in from the boiler, then connect a length of hose to the drain valve at the bottom of the expansion tank and direct this to a drain or large container of some kind.
35.
:: : If freezing pipes during an absence are a concern, it's best to shut off the main water valve and drain the pipes by leaving the faucets open ( and draining the water heater, which will have its own drain valve ).
36.
The agency also said that from April 20, 1999, to April 8, 2000, Alaska allegedly operated one 737 and two MD-80 aircraft with maintenance improperly deferred on items under its minimum equipment list, including a drain valve power circuit breaker and a stair light.
37.
Philip Keil Sr ., a 65-year-old former civilian mechanic at Kelly, recalled two years ago that for nine years beginning in 1969, he was ordered annually to open the drain valves on huge tanks of solvent baths and rinses for the base's automated aircraft-parts conveyor.
38.
Models which use an oral / nasal internal seal will usually drain to the demand valve or an additional drain valve at a low point when the diver's face is roughly upright or face down, and these will clear during normal breathing for small leaks, and may be cleared of major flooding by using the purge button on the demand valve to fill the mask with air.
