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Old 05-20-2010, 09:43 AM   #1
nmc
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Level basement sewer outflow question


HI

I have an existing basement laundry room which I am splitting to add a bathroom too. The problem I think I am going to have is that the existing 3 inch cast iron pipe that I am tying into was set without enough of an incline.

To avoid possible build-up of water/solids from the toilet and shwoer etc, if I install them on the level of the basement floor. Will this be resolved by raising the level of hte bathroom so that the first 1-2 feet of water discharge will be faster - thereby pushing it along the more level part of the pipe?

Failing that is there a way to use a pump that just speeds up the water flow when the shower is used, or the toilet flushed as opposed to the ejector type which requires an addition of a well?

Any suggestions would be appreciated!!

Thx

Nick

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Old 05-20-2010, 06:50 PM   #2
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Level basement sewer outflow question


Not sure what to suggest other than installing a brand new drain pipe with the proper slope, perhaps running alongside the pipe you were mentioning.

You can build the entire bathroom upon an 8 inch or so deck to achieve the necessary vertical space for sloping the new drain pipe with. But you must have enough ceiling headroom.

Even if you use a sewage pump and holding well, when the pump kicks on, the discharge must go into a pipe with the proper slope.

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Old 05-20-2010, 07:19 PM   #3
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Level basement sewer outflow question


I've always thought that bathrooms in a basement that are built on a platform, reek of handy-hack work. I understand the concern with a pump, but if installed correctly they can give many years of reliable service. The trick is to properly install the system, so that when the day comes the pump can be serviced with minimal problems.

To help could you post some pics of the basement and the questionable pipe?
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Old 05-21-2010, 09:01 AM   #4
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Level basement sewer outflow question


Nick,
Here's another option for you:
http://www.zoellerpumps.com/ProductB...x?ProductID=60

I just saw one of these the other day on a job. Not very big, no breaking up the concrete. Very simple to install.
Mike Hawkins
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Old 05-22-2010, 08:54 AM   #5
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Level basement sewer outflow question


Quote:
Originally Posted by firehawkmph View Post
Nick,
Here's another option for you:
http://www.zoellerpumps.com/ProductB...x?ProductID=60

I just saw one of these the other day on a job. Not very big, no breaking up the concrete. Very simple to install.
Mike Hawkins
The OP mentioned a toilet as part of the install. The pump you suggested is for a shower or lav, by itself. According to most plumbing codes, if it is to receive the discharge of a toilet, a pump must be installed with a 2 inch discharge line. The pump recommended has a 1 inch discharge line, so no go.
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Old 05-22-2010, 10:29 AM   #6
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Level basement sewer outflow question


Quote:
Originally Posted by O'Leaky View Post
The OP mentioned a toilet as part of the install. The pump you suggested is for a shower or lav, by itself. According to most plumbing codes, if it is to receive the discharge of a toilet, a pump must be installed with a 2 inch discharge line. The pump recommended has a 1 inch discharge line, so no go.
O' Leaky,
I may have linked the wrong one. I just saw one the other day that had an outlet for a rear discharge toilet and a shower connection also. I am not a plumber, so I am not sure on codes for these. But it was being used on a commercial job that was being inspected, so I would guess it passes here. Seemed like a pretty nice unit.
Mike Hawkins
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Old 05-22-2010, 01:29 PM   #7
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Level basement sewer outflow question


How do you know what the slope of the existing 3" line is? What is currently using this 3" line? If you use a ejector basin and pump you'll still need to route the new drain to enter the existing sewer line at the point where the slope is correct so you might as well correct the existing line and then you won't need the pump.

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