Pressure loss in one zone...

[cahermit]

I have a client with their front yard split into 2 zones.
One zone is functioning just fine. The other zone has a lack of pressure, causing the spray heads to not rise completely, which I had figured out to be a bust on the outer edge due to roots. So I fixed the break, but it didn't fix the problem. There are no soggy or especially green patches, so I'm not too sure that it's another break.
Am I wrong in assuming that the problem is either another break in the line, or a clogged valve? This zone has less heads than the functioning zone, but I was also concerned because whoever installed the system used a bunch of funky nozzles, putting 180's where there should be 90s, etc... If I changed these nozzles out to the appropriate spray patterns, could this make that much of a pressure change? I wouldn't think so, but that might also be the plm...
Thx.

[Mike Leary]

Is this system something you just took on, or have you seen it work before?

[Mike Leary]

I think you got my drift..it mite never have worked..before you tear into the
valve & after you've checked for a iso valve (doubtfull on a small system),
turn the flow controls down one by one to increase the psi...check the wiper
seals for flow-by. We finally had custom blank nozzles made to check system
operation, all should have a few in service truck.

[PurpHaze]

Without seeing the system here's just another guess: Put the correct nozzles in and then check and see (listen) if the valve diaphragm is opening fully.

[cahermit]

ya I've seen it work before.
I wasn't sure if they had those blank nozzles to check system pressure, but I had thought of that and intended on inventing them if they didn't exist... :)
I will certainly need to switch out the nozzles. I don't understand how idiots can do such stupid things. But then again, another idiot amazes me every day.
Thanks for the replies and when I get it fixed I'll post here with what it was...

[gusbuster]

Really simple and not probably thought of, on the problem zone, close off the flow adjuster on all the spray head. If you have a broken nipple,pipe somewhere in the system, it should make it manifest itself.

What brand is the body of sprays? Toro, watermaster\orbit,rain bird...

[cahermit]

I think they're all crappy toros...

[cahermit]

So, I fixed the problem, I simply turned on the valve for the zone, turned off all of the spray heads (using the screw :) ), and walked the lawn until I noticed the flow of a leak. Fixed it, tested it. All is well.