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Participant

Join Date: Feb 2011
Posts: 1

Enquiry

02/12/2011 3:24 AM

i have 4 water closet unit and i want to know the pipe size that im going to use for my main line dischraging to the manhole?

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#1

Re: enquiry

02/12/2011 3:34 AM

Comply with local building regulations.

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Guru

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#2

Re: enquiry

02/12/2011 5:36 AM

a 100mm dia pipe will do, just make sure the slope is maintained with in the range of 5% to 13% and fittings (45 & 90 deg) bends are installed in consistent with the plumbing code.

Above answer, is best preferable consult local building regulation.

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#3

Re: Enquiry

02/12/2011 7:29 AM

90mm swv

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#4

Re: Enquiry

02/12/2011 9:16 AM

Could somebody please translate. I was born in Arkansas and led a sheltered life.

i have 4 water closet unit and i want to know the pipe size that im going to use for my main line dischraging to the manhole?

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#5
In reply to #4

Re: Enquiry

02/12/2011 10:54 AM

It appears to me that this member is trying to size a discharge pipe for a facility having 4 toilets. Usually a 4 inch discharge line is used in houses with more than 3 toilets. The grade is 2 percent to the septic tank and the laterals are usually laid at 1% slope. The grade is kept so small to prevent the liquid from outrunning the solids..

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#6
In reply to #5

Re: Enquiry

02/12/2011 11:05 AM

GA and welcome to cr4

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klearzen
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#7
In reply to #5

Re: Enquiry

02/12/2011 11:31 AM

Welcome, and thanks.

That part about discharging into the manhole bothered me. But then, I take everything literally.

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Anonymous Poster
#8
In reply to #7

Re: Enquiry

02/13/2011 1:01 PM

Unpleasant for the sewer workers.

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#9
In reply to #5

Re: Enquiry

02/13/2011 11:12 PM

Good answer except the questioner is running to a manhole which presumes a community sewer system. In which case the lateral is the line from the lot to the main and is usually kept at 2% also, Then the sewer mainlines will run at 1% due to their increased size and thus need to maintain flow depth for consolidation of fluids and solids. Just make sure it runs downhill and don't chew your fingernails.

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