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Old 05-02-2013, 07:08 PM   #1
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Converting Bath to Shower


My wife wants to remove an outdated jetted tub on the second floor of our home and replace it with a shower. My understanding is that I need a 2" drain. The existing bath tub has a 1 1/2" drain. Can I leave the 1 1/2" vent pipe when I replace the drain pipe with a 2" pipe or will I need to make the vent pipe to through the roof 2" also?

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Old 05-02-2013, 07:57 PM   #2
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You will be fine with a 1 1/2" vent----that will work well and meet code---

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Old 05-02-2013, 08:07 PM   #3
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Converting Bath to Shower


Mike is right....1 1/2" vent is fine.....assuming you don't have a bunch of other stuff on it....there is a formula for calculating it....

Just a little background....as I understand it....a bathtub can drain slowly....you have a tub holding the water.....but on a shower, there is no 'tub' to hold the water....hence, it needs to drain out as quick as possible....hence, the 2" drain....
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Old 05-02-2013, 08:10 PM   #4
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Yikes---1 1/2 VENT is fine---drain must be 2"----
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Old 05-02-2013, 08:12 PM   #5
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Converting Bath to Shower


Quote:
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Yikes---1 1/2 VENT is fine---drain must be 2"----
Thanks Mike.....vent, drain.....what ever it takes.....long day....
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Old 05-02-2013, 09:09 PM   #6
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Converting Bath to Shower


i have a 1 1/2" drain in my shower. NO issues what so ever.
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Old 05-03-2013, 06:19 AM   #7
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Times change and codes change----2" is code --and hair and crud cause enough slow 2" drains that choosing 1 1/2" when remodeling is just a poor choice.
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Old 05-04-2013, 07:54 AM   #8
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yeah. there was 1 1/2" in there already. so when i replaced it, i just went with the same size. when i redo the bathroom, i will code it all.

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