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Posted by dan on May 3, 2008, 6:43 pm
Norminn wrote:
> dan wrote:
>
> > Info:
> >
> > 4 zones
> > 1.5 HP pump on well
> > Lot size: 125 X 80
> > House Size: 55 X 55 (Guesstimate)
> > Shed: 16 X 12
> > Age: approx 15 years (That's a guess, the house is that old)
> >
> > All zones appear to have low pressure. I measured one zone it was at
> > about 21 psi and another around the same (so low the pop-up
> > sprinklers won't rotate). I believe the system was designed at bare
> > minimums and does not fully cover the lawn. It also has a mosh-posh
> > of zoning (one zone hits half of back yard and 2 heads in the front
> > yard.
> >
> > I believe my main issue is pressure. I thought about going to a 2hp
> > pump. But then the zones really don't fully cover the lawn anyway so
> > I'm thinking about just replacing the whole system and going with 5
> > zones.
> >
> > I hate leaving the old piping in, but it would be a pain to take
> > out. I thought about using different colored pipe so in the future,
> > I'd know what the new system was on. The current system uses white
> > pipe from what I have seen, but who knows what it uses where I
> > haven't seen it.
> >
> > Thoughts?
> >
> You say it doesn't cover well......did you formerly have higher
> pressure and it still didn't cover? Seems such low pressure would be
We bought the house with it installed. It never had adequate cover from
the time we bought it.
> the problem, and boosting the pressure the solution. 15 years isn't
> very old for pvc pipe - ours is 40 and in fine shape. We have had
> pipe damage when mowers run over s.h.'s, but that is carelessness.
> Flex pipe can also help. We get strips that get too dry because trees
> planted since the s.s. instlalation block water to a strip.
>
> Sprinkler head companies provide design service if you sent drawings;
> that would be one solution to get adequate coverage. Any time you
> put in heads with different flow, you change the coverage to the
> other heads on the zone. Might just need adjusting or changing the
> heads if you get the pressure up to a decent level. What is the
> water supply? Meter on full?
I plan to have a design done just to see if the original was
ill-planned. Something else I didn't mention. We had a sprinkler
company come in to "fix" low pressure on one of the lines. They said
there was a leak somewhere. Instead of fixing, they just put in a new
line with sprinkler heads - idiots! Now I have one dead set of lines
and another that still doesn't work properly.
--
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