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Posted by Jerry on May 6, 2008, 7:12 pm
On May 6, 1:22=A0pm, "dan" <> wrote:
> ransley wrote:
> > On May 4, 10:27=A0am, "dan" <> wrote:
> > > trad...@optonline.net wrote:
> > > > Certainly figuring out what the pressure and flow rate are at the
> > > > beginning of the system is the key. =A0 It could be that is the
> > > > problem or it could be a problem in the irrigation system itself,
> > > > or a combo of the two.
>
> > > I installed a pressure gage just after the pump and just before the
> > > valves to the zones. The pressure ranged from 20-28 psi. That seems
> > > low to me. Also, the pressure gage "bounced" like it was being
> > > vibrated. =A0The pressure was not steady. I'm not sure if this is
> > > normal on a sprinkler system.
>
> > > --
>
> > 28 is too low, 50-80 is more normal, probably its the pump. With
> > correct volume and pressure adding a run and heads might do it.
>
> It seems obvious that the pump is bad (low pressure) but are there any
> ways to really tell? I'd hate to replace the pump to find the well
> couldn't keep up and that's the real issue or something like that.
>
> --- Hide quoted text -
>
> - Show quoted text -
Toro's design guide recommends a minimum of 45 PSI at 10 GPM flow for
use with pumps.
http://www.toro.com/sprinklers/design.pdf
Jerry
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