Ook wrote:

On Jun 25, 9:28 pm, M Q wrote:

Ook wrote:

"Ook" wrote in message

...

can run 3 sprinklers just fine at about a 50% duty cycle. It tends to suck a
bit of air at high volumes, so I'm thinking that I might be pushing the
limit of mywell'scapacity, it is a 2" pipe after all. I also found that it

...
If you have a marginalwell(if it is sucking air now it probably is --
just wait till then end of a dry season or drought year), you may want
to consider one or more of the following suggestions:


snip

I've never been entirely sure where the air is coming from. I noticed
....

The capacity of a well depends upon the static height of the water table
above the pump (7 feet in your case) and the porosity of the surrounding
soil/rock. When you pump, the water level in the well goes down (which
is also why more water will flow into the well). When you pump at a rate
that exceeds the capacity, the water level goes all the way down to the pump
inlet and you suck air, and thereby reducing the pumping rate to match
the well capacity. You did say: "tends to suck a bit of air at high volumes"
so I assumed that that was what was happening.
Do you have a way of monitoring the water level as you pump?

Also note that there may be a different short term and long term capacity.
i.e. you may be able to pump 10 gpm for an hour or two, but not days or weeks.