Adding a bath

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  #1  
Old 02-18-00, 03:34 AM
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I would like to know if the drain on the washing machine is large enough to handle the addition of a toilet, shower and tub?
The drain in question is on the exterior wall. I can access the drain by busting the slab, and tapping in to the drain. Oh yea, I have a septic system, and this drain is the last drop off the the main trunk line. This wash room is to be inlarged in the addition.
Thank in advance for any information. Jeff
 
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  #2  
Old 02-18-00, 05:51 AM
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Hi Jeff:

I'm sending your question over to plumbing. They should be better equipped to answer your qeustion.

Ted
 
  #3  
Old 02-18-00, 06:11 AM
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Washing machine drain o.k. for tub or sink, but definitely not for toilet (min. 3"). Check your local building codes, you'll need permit anyway, and they can tell you. Also, look into this site for "how-to". Great help!
 
  #4  
Old 02-20-00, 10:31 PM
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Thank Old Guy !! I have exposed this line before through the slab via a 12# sledge hammer!! But I can't remember if it was a 2" or 3" at the 90. Thanks again for your advice. Jeff
 
  #5  
Old 02-20-00, 10:36 PM
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Next Option! Would it be possible to run another trunk line from the addition to the septic tank, along the outside of the existing structure? Jeff
 
  #6  
Old 02-21-00, 06:03 PM
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Tie in the branch line from the addition with a sanitary tee into the main line to your tank. There is usually only one knockout hole for a main drainline into a septic tank, and believe me, you don't want to try to knock a new one through your concrete tank where one isn't supposed to be.
 
  #7  
Old 02-21-00, 09:38 PM
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I think that I understand what you are saying. The main line between the tank and the start of the slab? This is where I need the sanitary Tee? Do I have to worry about setteling of the addition slab, and the line breaking? Thanks again for aal your help!
Jeff
 
  #8  
Old 02-22-00, 02:48 AM
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Answer to 1st 2 ? is yes. Answer to 3rd ? is no, if your addition slab was poured correctly. Also, slope your drainlines toward septic line for gravity flow (1/4" per linear foot). Good Luck!
 
  #9  
Old 02-23-00, 12:34 AM
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Thanks once again! You have been very helpful and kind with your advice. Jeff
 
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