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  #41  
Old 10-07-2013, 03:23 PM
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1idejim 1idejim is online now
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Originally Posted by Wet_Boots View Post
What about that California cliff-top home that was done in by a constant irrigation system leak undermining the foundation? Solid motivation to include a master valve.
More motivation to find the leak. Who's to say that a daily leak of several hundred gallons rather than several thousand would have made a difference?

Spam and eggs or spam and bacon, house was still done in.
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  #42  
Old 10-07-2013, 03:45 PM
Stillwater Stillwater is offline
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Note to self...... Self... no Monty Python in the irragation forum....
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  #43  
Old 10-07-2013, 04:09 PM
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Originally Posted by 1idejim View Post
More motivation to find the leak. Who's to say that a daily leak of several hundred gallons rather than several thousand would have made a difference?
I would be much more concerned about a large leak, that went unnoticed for days, than a mainline drip.
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  #44  
Old 10-07-2013, 04:31 PM
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Originally Posted by irritation View Post
I would be much more concerned about a large leak, that went unnoticed for days, than a mainline drip.
I can understand your concern but think of this scenario, 8.33 gph x 24 hrs per day = 200 gpd x 365 days per yr = 73,000 gpy.

A mainline break of say 50 gpm x 60 = 3,000 gph x 24 = 72,000 gpd

Roughly the same amount of water, one may or may not be more noticeable but the damage may not differ much in certain soils. I'm just saying that if you have a system that includes a MV you should be testing the mainline for leaks by using the meter a few times a year. Afterall a majority of the forum members are in maintenance or management.
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  #45  
Old 10-07-2013, 04:58 PM
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A drip won't cause erosion like a pressurized larger leak would.
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  #46  
Old 10-07-2013, 06:24 PM
Without A Drought Without A Drought is online now
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is this the new poly vs. pvc debate?? to MV or not to MV that be the question.

recanting my previous statement, master valves are more of a pain in the butt than they are helpful. they mask all leaks, be it large or small, and during a manual service inspection require a manual opening, which then requires me remembering to manually close. which i usually dont remember to do till im on my way home for the day, thus negating any beneficial quality of said master valve.

my new position, master valves only belong with flow sensors and smarter controllers. all other installations are poppycock.
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  #47  
Old 10-07-2013, 06:38 PM
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Not only do you have to manually open the master valve but bleed any air from the main and wait for the pressure test.
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  #48  
Old 10-07-2013, 07:09 PM
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Originally Posted by irritation View Post
Not only do you have to manually open the master valve but bleed any air from the main and wait for the pressure test.
You can fire the furthest valve for 1 minute from the controller, power off the clock, remove the common and MV wires. Connect a stationmaster to those wires and actuate the MV with all zones shut. Look at the meter until you are satisfied and hook the 2 wires back up. Then you can have a beer!!!!

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  #49  
Old 10-07-2013, 07:13 PM
Stillwater Stillwater is offline
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What kind of beer?
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  #50  
Old 10-07-2013, 07:14 PM
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Poly everything here. Master valve with flow control only on systems where supply exceeds 85 psi.
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