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avernon0112
08-05-2012, 07:37 PM
I am starting to get into the install side of the business. I have 3 jobs in the works now. Some additions and some new installs altogether. My questions is what do you use to get flow and pressure readings for 1.5 to 3 inch lines? All my searches only show 13 GPM max guages and that is nowhere close to what need. I have asked in the supply houses and no one can seem to give me a answer....

Wet_Boots
08-05-2012, 07:46 PM
Just how would you go about using a flow gauge that can read 400 gpm? It isn't like there are convenient places to connect a flow gauge in the larger-diameter plumbing.

avernon0112
08-05-2012, 07:50 PM
Well then how do you know how to design on a larger system other than using the safe flow on the meter and backflow?

Wet_Boots
08-05-2012, 07:53 PM
Just how many acres are you going to be watering? It would surprise me that anything really big isn't already designed and specified.

avernon0112
08-05-2012, 08:14 PM
Why is it hard to believe that it has not already been designed? These are not new buildings. One is a roadway that was totally destroyed by a widening project. Another is a existing building that is wanting to add irrigation.
I mainly would use 1.5 to 2 inch. Not sure of the acreage off hand looking at 25 to 30 zones at first guess depending on the amount of drip needed for the landscape install.

1idejim
08-05-2012, 08:31 PM
Why is it hard to believe that it has not already been designed? These are not new buildings. One is a roadway that was totally destroyed by a widening project. Another is a existing building that is wanting to add irrigation.
I mainly would use 1.5 to 2 inch. Not sure of the acreage off hand looking at 25 to 30 zones at first guess depending on the amount of drip needed for the landscape install.

non contact ultrasonic flow meters are available. They are spendy yet affordable.

Drawback is they are size specific.

5 fps is what you design around anyhow.
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cgaengineer
08-05-2012, 08:35 PM
Take a look at a Pollard diffuser with piezo tube and flow gauge.
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txirrigation
08-05-2012, 08:49 PM
what size is the water meter? That seems to be missing from your calculations.

avernon0112
08-05-2012, 08:52 PM
5 fps is what you design around anyhow.
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I understand that but would just like to make sure that I know what my pressure is rather than put everything in on a guess. That could make for a bad day.

avernon0112
08-05-2012, 08:59 PM
what size is the water meter? That seems to be missing from your calculations.

On one of the existing systems it has 2, 1.5 inch meters, another has a 2.5 inch meter. All the others will be new stuff.

1idejim
08-05-2012, 10:13 PM
I understand that but would just like to make sure that I know what my pressure is rather than put everything in on a guess. That could make for a bad day.

You can get static and working pressure from the nearest HB. The meter size (with all due respect Tx) is established and therefore accessible through the purveyor.
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