I am a principle at an Elementary School. I want to change the fire alarm sound throughout the whole school. What would make a good fire alarm for an Elementary School?Remember: Best Answer 10 points :)
It may not be expanding into anything. It may be creating its own space as it expands. But if it is expanding into an area that already exists, I would think that it's expanding into an area of less pressure. A vacuum's volume can be increased or expanded.
k thick walled pipe usually only for certain industrial applocations L-medium walled-used on homes etc for water supply lines -hot and cold water-baseboard heatingetc M-thin walled pipe used also like type L but cheaper. Home Depot stuff. DWV drain, waste, and vent. Used as the name implies. Not for water suppliesonly drainsvery thin. comes in sizes from 2 1/4 and larger. A not familiar with this one.
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K is a soft temper thick wall pipe for underground use. This pipe accepts flared end type fittings suitable for underground use and is flexible enough to lay around obstacles. L is a soft temper thin wall pipe for above ground use. This pipe accepts suitable above ground fittings like sweat fittings. It is commonly used in residential use for the heating pipes in boiler style construction and any behind the wall use. Since it is bendable it can cut down on the use of expensive fittings. M is a hard temper that is used with sweat fittings commonly found in residential construction in the walls. It can not be bent much and has a thin wall.
