pump question and diverter question

[*ryan]

i got my pool up and running
i am working on balancing the chems now
but i have a few questions

i have a speck e90-ii pump
in an 11000 gallon pool
im trying to figure out the duration of time i need it to be set too
i beleive i read it needs to be at minimal enough to pump all the water threw the filter
meaning all 11000 gallons

according to http://www.poolcenter.com/speck-E90-DS.pdf

my pump depending on the head will pump anywhere from say 60-90 gallons p min

so 11000/75 then /60 min = 2.44 hours??
so a min 3 hours say

so why is it i am reading we are pumping 8+ hours?
i understand better circulation, filtering, dispursion
but 3x as long almost??



also
on my input i have this guy

what is it?
it looks like a diverter valve
i have the 1 skimmer tho
and today while vacuming the pool (first time)
i noticed a small gaurded round cap petruding out the bottom of the pool
is this a 2nd dary input?
if it is, well, i didnt dewinterize it, everything is pumping fine and working fine, so is it possible it wasnt winterized?
how would i check?

and what would i put my diverter on?
right now i put it in the middle, so 50/50
as i have no clue what it is


also, i took out the rubber winterizing plugs in the 2 outlets into the pool, but i do not have any nozzles to put in there place? should there be any?
thank you

 

[Bama Rambler]

Your pump is probably pumping closer to 60 gpm with that setup.
One reason people run their pump longer than needed is because every pool is different and the 1 turn per day is minimum and it usually takes longer than minimum to keep it clear.

That valve is a 3-way valve and apparently it switches between the skimmer and main drain. You would run it whever you get good circulation from the skimmer and some from the MD.

 

[*ryan]

ok so i want to control it so most is getting pulled threw the skimmer and only a little threw the md

thank you