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3" or 4" line to Septic Tank?

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3" or 4" line to Septic Tank? Scott Townsend 07-07-2006
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Posted by Scott Townsend on July 7, 2006, 4:17 pm
We are in the Process of installing a new Septic Tank and wanted people's
opinions on if I should have a 3" line to the Tank or a 4" line to the tank?

I've heard that the 3" is 1/4" per foot Drop and with the steeper sides
allows the solids to be carried away easier with less liquid. Clogs a bit
more then a 4"

I'm heard that the 4" is 1/8" per foot Drop. With the shallower sides it
would allow the liquid to run away from the solids much faster and would
hardly ever clog.

So it seems like there are plusses and minuses to both. I'm going about 80'
from the house to the tank and have the 1/4" drop that I would need for 4"

Suggestions? Comments?

Thanks!



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Posted by lee houston on July 7, 2006, 4:50 pm
> So it seems like there are plusses and minuses to both. I'm going about
> 80' from the house to the tank and have the 1/4" drop that I would need
> for 4"
>
> Suggestions? Comments?
80 feet is a long run. Go with the 4" and use your 1/4" drop for best
flow.

lee h



Posted by George E. Cawthon on July 7, 2006, 6:08 pm
lee houston wrote:
>> So it seems like there are plusses and minuses to both. I'm going about
>> 80' from the house to the tank and have the 1/4" drop that I would need
>> for 4"
>>
>> Suggestions? Comments?
> 80 feet is a long run. Go with the 4" and use your 1/4" drop for best
> flow.
>
> lee h
>
>
And put a clean out every 20 feet.

Posted by Scott Townsend on July 7, 2006, 6:36 pm
every 20'???

Hmmm... Seems Excessive? We were thinking of one right at the exit of the
home, then its pretty much a straight shot to the tank. Would look funny
with 4 cleanouts sprinkled throughout the yard?

Thanks!

> lee houston wrote:
>>> So it seems like there are plusses and minuses to both. I'm going about
>>> 80' from the house to the tank and have the 1/4" drop that I would need
>>> for 4"
>>>
>>> Suggestions? Comments?
>> 80 feet is a long run. Go with the 4" and use your 1/4" drop for best
>> flow.
>>
>> lee h
>>
>>
> And put a clean out every 20 feet.



Posted by HeyBub on July 7, 2006, 8:21 pm
Scott Townsend wrote:
> every 20'???
>
> Hmmm... Seems Excessive? We were thinking of one right at the exit
> of the home, then its pretty much a straight shot to the tank. Would look
> funny with 4 cleanouts sprinkled throughout the yard?

Set a Bar-B-Que on the first, a rock garden on the second, and a bird-bath
on the third.

You'll have a hard time going eighty feed with a fifty-foot snake.



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