Raggare
New Member
Hi all,
I thought I knew what pump size I need, but after seeing the well driller's recommendation I am confused and need some advice.
Well depth: 315'
Well size: 6"
Static water level: 120'
Pumping level (after pumping 9.5 gpm for 1 hour): 150'
Bladder tank in house is basically at grade level.
I want to use a 40/60 psi pressure switch (= 138' head).
It's a 2-3 bedroom house, so I figure I need about 10 gpm.
So I was going for a 10 gpm, 1 horsepower, Grundfos 10S10-15 pump, set at 200 feet.
(This would give me 10 gpm, when pumping against 150'+138' head.)
My well driller recommends a 25 gpm pump, set at 220 feet.
This flow sounds too much to me. Any idea why he wrote this? To minimize starts/stops? To minimize running time? Or maybe he is correct?
I really appreciate any advice you can give.
Thanks,
Per
I thought I knew what pump size I need, but after seeing the well driller's recommendation I am confused and need some advice.
Well depth: 315'
Well size: 6"
Static water level: 120'
Pumping level (after pumping 9.5 gpm for 1 hour): 150'
Bladder tank in house is basically at grade level.
I want to use a 40/60 psi pressure switch (= 138' head).
It's a 2-3 bedroom house, so I figure I need about 10 gpm.
So I was going for a 10 gpm, 1 horsepower, Grundfos 10S10-15 pump, set at 200 feet.
(This would give me 10 gpm, when pumping against 150'+138' head.)
My well driller recommends a 25 gpm pump, set at 220 feet.
This flow sounds too much to me. Any idea why he wrote this? To minimize starts/stops? To minimize running time? Or maybe he is correct?
I really appreciate any advice you can give.
Thanks,
Per