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  #11  
Old 12-06-2009, 10:43 PM
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ARGOS ARGOS is offline
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I haven't visually inspected the water that flushes through the R/O system/filter, but I service and have installed on several homes with R/O systems and the zones that are not run through the R/O are a real mess, leaving me to think that the flush water coming out of the R/O filter is going to be pretty messy and full of particles that would clog a drip system unless it had some serious self flushing filters. I would also question the wisdom of running the flush part of the system on trees...concentrated iron? I would want to test the water coming out of the flush part, sure there is no salt, but what other concentrates? I would also test the soil. I am pretty sure you are in an alkaline area, but you don't want to o.d. on iron. I am sure Kiril can chime in on this stuff.
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  #12  
Old 12-06-2009, 11:45 PM
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Quote:
Originally Posted by ARGOS View Post
I haven't visually inspected the water that flushes through the R/O system/filter, but I service and have installed on several homes with R/O systems and the zones that are not run through the R/O are a real mess, leaving me to think that the flush water coming out of the R/O filter is going to be pretty messy and full of particles that would clog a drip system unless it had some serious self flushing filters. I would also question the wisdom of running the flush part of the system on trees...concentrated iron? I would want to test the water coming out of the flush part, sure there is no salt, but what other concentrates? I would also test the soil. I am pretty sure you are in an alkaline area, but you don't want to o.d. on iron. I am sure Kiril can chime in on this stuff.
thank you very much argos,

the main thing i was concerned with was the extra water carl is putting into the system as there is no way of diverting excess water from the line. it's like every few hrs. 5- 10 gals are introduced to the system. he put a check valve at the discharge pipe at the pump house.

i'm not sure how much water the redwood trees need and told him to call a nursery about the trees requirements.

carl told me today that he's running 3 ea. 5gph for 1hr. twice a day. that's somewhere around 30 gal a day plus the 100gal from the flush water, my math may be close with a grand total of around 36 gals a day.

is it that he may be drowning them?

carl wait a sec. i'll ask the lawnsite crew, someone there will know for sure.

Last edited by 1idejim; 12-06-2009 at 11:51 PM.
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  #13  
Old 12-07-2009, 09:50 AM
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Mike Leary Mike Leary is offline
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You California guys getting hammered with weather?
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  #14  
Old 12-07-2009, 10:00 AM
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who needs weather to get hammered
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  #15  
Old 12-07-2009, 10:32 AM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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i like the concept of trying to reuse the waste water. If I flow charted the problem out I'd start by testing the water. i wouldn't take anybody's word for its quality.

Then I'd dig around the trees to see what the moisture level is like. You may find digging down a foot or so they are sitting in a pool.

it also sounds like the trees get double watered from the system as well as the waste water. I'm betting those trees are drowning. In ten years they may love all that extra water.
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  #16  
Old 12-07-2009, 10:33 AM
Kiril Kiril is offline
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Originally Posted by 1idejim View Post
sorry guys, it is not salt and is located at the well.

it is an r/o system
You can (and will) still be increasing the salt load, be it RO or ion exchange.

First thing I would be doing is checking/comparing the EC values of the soil between the trees that get the backwash vs. the trees that don't.
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  #17  
Old 12-07-2009, 10:45 AM
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Originally Posted by Kiril View Post
You can (and will) still be increasing the salt load, be it RO or ion exchange.
Additionally with drip you are still concentrating saline to a very localized area. I read an article once (I think it was graduate work from Davis) that researched redwood trees on drip systems. It found that many redwood trees in landscapes on drip irrigation were distressed due to the saline build up caused from drip irrigation water delivery.

But apparently there are varieties of redwoods that have a higher saline tolerance therefore allowing one to choose the right tree in water recycle situations.

Response of two coast redwood (Sequoia sempervirens Endl.) varieties to moderate levels of salt and boron spray measured by stress symptoms: Implications for landscape irrigation using recycled water
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  #18  
Old 12-07-2009, 10:56 AM
Marcos Marcos is offline
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Originally Posted by 1idejim View Post
i'm not sure how much water the redwood trees need and told him to call a nursery about the trees requirements.

carl told me today that he's running 3 ea. 5gph for 1hr. twice a day. that's somewhere around 30 gal a day plus the 100gal from the flush water, my math may be close with a grand total of around 36 gals a day.
I admit I'm no left coaster.
I grow trees in a small wholesale nursery here & do know a thing or two about redwoods.
I don't believe anyone's talked about the size of these trees.
Has this guy Carl mentioned the average caliper diameter for these trees at waist high?
If these trees aren't large & well established, 36 gallon / day might be enough to drown them, largely depending upon what type of soil base you have there.
Sandy, I hope.
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  #19  
Old 12-07-2009, 10:59 AM
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Mike Leary Mike Leary is offline
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I'd still have that water tested, it's not expensive, at least up north.
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  #20  
Old 12-07-2009, 11:04 AM
Kiril Kiril is offline
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Quote:
Originally Posted by ARGOS View Post
Additionally with drip you are still concentrating saline to a very localized area. I read an article once (I think it was graduate work from Davis) that researched redwood trees on drip systems. It found that many redwood trees in landscapes on drip irrigation were distressed due to the saline build up caused from drip irrigation water delivery.

But apparently there are varieties of redwoods that have a higher saline tolerance therefore allowing one to choose the right tree in water recycle situations.
Yes, I agree there is going to be notable salt deposition at the edge of the wetting front, maybe even a visible one. With as much water as he is putting on, that is less of a concern than the overall salinity of the water.

If he is using ground water, chances are very good it is hard water. Redwoods (Sequoia sempervirens) in general don't like alkaline water or soil, so if he is increasing his basic ion load with his backwash, it will create problems, especially if he is sitting on a clay loam.
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