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Old 08-05-2012, 07:37 PM
avernon0112 avernon0112 is offline
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Flow/ pressure gauge

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....
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Old 08-05-2012, 07:46 PM
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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.
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Old 08-05-2012, 07:50 PM
avernon0112 avernon0112 is offline
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Well then how do you know how to design on a larger system other than using the safe flow on the meter and backflow?
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Old 08-05-2012, 07:53 PM
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Just how many acres are you going to be watering? It would surprise me that anything really big isn't already designed and specified.
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Old 08-05-2012, 08:14 PM
avernon0112 avernon0112 is offline
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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.
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Old 08-05-2012, 08:31 PM
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Quote:
Originally Posted by avernon0112 View Post
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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Old 08-05-2012, 08:35 PM
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cgaengineer cgaengineer is offline
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Take a look at a Pollard diffuser with piezo tube and flow gauge.
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Old 08-05-2012, 08:49 PM
txirrigation txirrigation is offline
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what size is the water meter? That seems to be missing from your calculations.
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Old 08-05-2012, 08:52 PM
avernon0112 avernon0112 is offline
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Originally Posted by 1idejim View Post

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.
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Old 08-05-2012, 08:59 PM
avernon0112 avernon0112 is offline
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Originally Posted by txirrigation View Post
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.
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