high-rate sand filters for swimming pools work on a vacuum principle much like an ordinary vacuum cleaner. the filter draws in water instead of air (this is why air in the filter system or lines in unwanted - air will cause the "vacuum" pressure to fall). submerged and suspended particles are drawn in from the bottom drains while surface floating debris is drawn in through the skimmer assembly.

which statement would be the best final sentence in a conclusion on the topic of sand filter maintenance?
a) the pump will cause water to flow from the pool through the hair and lint pot.
b) set the pump on backwash whenever it needs to be cleaned with the cleaning process.
c) the multiport valve on the pump controls the flow of water depending on the setting.
d) over time the sand bed will become plugged with dirt and require a cleaning process known as backwashing.

here's some tricks. write on a book that you have read and really enjoyed. first, start by writing down basic event in the book. have your first paragraph be an intro explaining like the author, the reason the book was written if known, and other backround info like that. paragraph two explain what happens in the first few chapters and the signifigance it had. then for paragraph 3, do the same thing but for the middle. i'm pretty sure you get the point for paragraph 4. just rap things up and explain the call to action. for the final paragragh (paragraph 5) , explain your views on the book, the message, ect. tip: something that might is to go onto cliff notes or something and read the anaylisis of each chapter.

some books i recommend;

diary of anne frank

lord of the flies

vey information about pap? physical description beliefs actions interactions

what arguments, appeals, and rhetorical strategies did patrick henry use in 1775 to persuade reluctant members of the second virginia convention to develop a military response to british aggression or n 1775 american independence was not a foregone conclusion. while there had been unrest and resistance in massachusetts with scattered acts of support from other areas, no organized movement toward revolution existed across the colonies. virginia ranked among the largest, wealthiest, and most populous colonies in 1775, and her political and military support for independence would be crucial for success. in this speech patrick henry (1736–1799) uses powerful rhetoric to convince influential, affluent, landed men of virginia with much to lose to move past their current diplomatic posture opposing british aggression to the more treasonous one of open military preparedness. hope it

explanation:

i just had to do some research a while stayed up all night