I had automatic lawn sprinklers installed and have had low pressure
from the sprinklers since then. Th line pressure is MORE than what is
expected so it must have something to do with this new set-up. No new
sprinklers were added so this can't be the answer. I now have brown
spots where the sprinklers don't reach. Was this a bad installation
job or any ideas? Thanks.

Let me ask for a clarification: You just added automatic valves. (right?)
Everything else worked fine before the new valves?

"RO" wrote in message
om...
I had automatic lawn sprinklers installed and have had low pressure
from the sprinklers since then. Th line pressure is MORE than what is
expected so it must have something to do with this new set-up. No new
sprinklers were added so this can't be the answer. I now have brown
spots where the sprinklers don't reach. Was this a bad installation
job or any ideas? Thanks.

Yes and Yes. Thanks.


"Greg Rice" wrote in message
link.net...
Let me ask for a clarification: You just added automatic valves.
(right?)
Everything else worked fine before the new valves?

"RO" wrote in message
om...
I had automatic lawn sprinklers installed and have had low
pressure
from the sprinklers since then. Th line pressure is MORE than what
is
expected so it must have something to do with this new set-up. No
new
sprinklers were added so this can't be the answer. I now have
brown
spots where the sprinklers don't reach. Was this a bad
installation
job or any ideas? Thanks.

OK... What is the diameter of the new valves? They usually come is sizes of
1/2 inch or bigger. If your old pipes are bigger than the new valves... they
would limit the amount of water. Also, did you re-route the sprinklers so
that you now have more sprinklers running in each section?

Normally, if your new valves are big enough - there shouldn't have been any
change, unless you added more sprinklers.

"RO" wrote in message
om...
I had automatic lawn sprinklers installed and have had low pressure
from the sprinklers since then. Th line pressure is MORE than what is
expected so it must have something to do with this new set-up. No new
sprinklers were added so this can't be the answer. I now have brown
spots where the sprinklers don't reach. Was this a bad installation
job or any ideas? Thanks.

It sounds like either the valves are too small for your application or they
are not opening fully. I had put in auto valve on my sprinkler system and
it worked flawlessly for a while, then I noticed that the pressure was not
nearly as robust as it use to be when first installed (was only about 2
weeks) and called the water company who told me there was no problem with
the pressure in the area. I replaced the auto valve system back to a simple
ballcock valve and presto I had full pressure again. I suspect that my new
valve went faulty and wasnt letting enough water through it.

"RO" wrote in message
om...
I had automatic lawn sprinklers installed and have had low pressure
from the sprinklers since then. Th line pressure is MORE than what is
expected so it must have something to do with this new set-up. No new
sprinklers were added so this can't be the answer. I now have brown
spots where the sprinklers don't reach. Was this a bad installation
job or any ideas? Thanks.


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Or they could have let dirt get in the system - check the screens. And
take off heads and turn the water on to clean lines

Without seeing your system I can't really say. Do you have a hose outlet on
the system? If so you could attach a pressure meter to determine the
pressure. I have designed several systems and it really requires more than a
hit or miss approach. You need to take into account factors including the
pressure drops through all elements of the system such as the pipes; valves,
the number of heads per zone and specs of the heads, the meter type, etc.
You didn't say if the system has ever worked properly or if this is a new
phenomenon." wrote in message
om...
I had automatic lawn sprinklers installed and have had low pressure
from the sprinklers since then. Th line pressure is MORE than what is
expected so it must have something to do with this new set-up. No new
sprinklers were added so this can't be the answer. I now have brown
spots where the sprinklers don't reach. Was this a bad installation
job or any ideas? Thanks.