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septic field-how deep tiles?

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glennster

06-29-2007 16:24:32




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how deep are the drain tiles typically in a septic field? 24 inches or so? neighbor was putting one in, i thought it seemed kinda shallow. they were using plstic leach pipe, had a sediment screen, and then back fill with pea gravel around the pipe, then dirt over it. sound about right?




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JTinNJ

07-02-2007 16:18:22




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
I put one in 2 years ago. The pit was 40'x40'x6' deep.Filled with sand after Health Dept inspected open pit. Put stone on top of sand. Then 4" PVC on top of stone.Then more stone.Covered with Hay then Clay then top soil.



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kmm

06-30-2007 18:16:34




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
Instead of the gravel, I now understand they are using shredded tires in are area.



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Steve Crum

06-30-2007 04:45:26




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
I'm suprised that you need to ask. Here in Pa. for the past 30 years, the sanitation department tells you how you will install a septic system. We installed 5 systems in 6 years between 1979 and 1985 3 in a trailer park we built and 1 each at Dad's and my place. Each time, the inspector (after perk tests and soil profiles) made up a hand drawn illustration of each system with depths, dimensions, types and tonnages of aggegates and how it all was to be covered. Once the base was in and the pipes in, he had to come back and approve the system before we could bury it. Each system is still working fine to this day.
Most all but the most remote locations these days require a sand mound I'm told.

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Big Hunter

06-30-2007 01:37:55




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
In this part of Md. the trench is usually 4 to 6 feet deep, 3 feet wide with 2 inches fall in 100 feet, #2 stone (1 1/2 to 3 inch stone) pipe about 1 to 2 feet from top, 6 inches to a foot cover of stone then paper or cloth then dirt



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paul

06-29-2007 22:27:14




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
I don't think you can go deeper than 1 foot here in Minnesota - where we get frost to 4 feet. D'oh.

Most places end up needing a mound system.

--->Paul



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buickanddeere

06-29-2007 21:33:42




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
The inspectors here are pushing the raised bed system. The drain tile are at surface level then covered with gravel then top soil.



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guess who

06-29-2007 19:50:30




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
From memory mine was one foot of three quarter inch stone with the 4 inch pipe centered in the foot of stone then a layer of hay or straw. I think next time I would use geo textile fabric though. Then there was 6 inches of top soil on top at the lowest finished point with the soil deeper in the higher elevated ares. It is important to keep the bottom of all the leach field level along with all the pipe level also.

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old

06-29-2007 19:24:06




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
The one I did in my home is about 200 foot long and starts at around 18 inches and then goes to about 4 foot at the end. It then has a 10 foot diameter dry well at the end about 15 foot deep filled with gravel. Put it in back in 1992 and have never had any trouble out of it



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Roy Suomi

06-29-2007 18:46:12




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
We use a layer of sand on top of the stone , helps leach moisture to the surface so it will evaporate..Then a thin layer of straw and soil on top of that..straw keeps the soil separated from the sand...



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xragman

06-29-2007 18:13:16




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
The requrements do vary with where you live. Most countys in U S A now require a permit from health department.They set the rules of what you can & cannot do. H T H



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Wild Bill

06-29-2007 16:33:58




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 Re: septic field-how deep tiles? in reply to glennster, 06-29-2007 16:24:32  
That is going to vary according to where you are at. Our trenches are typically 2 ft deep, line with 1" crushed stone, field lines on top of that, then covered with a few inches of more crushed stone, and covered with dirt.



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