Code Logic Question
 
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Old 04-01-2009, 05:38 PM   #1
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Code Logic Question

What is the logic behind the plumbing code in regard to minimum drain sizing between tubs and showers?

1 1/2 for tubs and 2 inch for showers? Logically to me it almost seems it should be the other way around.

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Old 04-01-2009, 06:15 PM   #2
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Re: Code Logic Question

The logic behind it is called flood level threshold, since the shower has a lower flood level threshold, you would want a 2" drain, where as a tubs flood threshold is allot higher, so 1-1/2" is good enough.

Hope that makes sense.
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Old 04-01-2009, 07:48 PM   #3
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Re: Code Logic Question

Hmm, I don't get it. What is flood threshold level?
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Old 04-01-2009, 07:49 PM   #4
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Re: Code Logic Question

Flood lever rim. Come on Mike your a bathroom remodeler right?
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Old 04-01-2009, 07:52 PM   #5
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Re: Code Logic Question

You're talking about having a bigger drain on a shower pan to avoid it filling with water?

That's the idea behind this?
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Old 04-01-2009, 07:54 PM   #6
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Re: Code Logic Question

It's logical.
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Old 04-01-2009, 07:58 PM   #7
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Re: Code Logic Question

Another logical answer would be all your shower drains are 2" and decreasing on the outlet side of the a drain is against code.
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Old 04-01-2009, 07:58 PM   #8
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Re: Code Logic Question

A shower receptor has little storage capacity, and therefore needs to drain as quickly as possible, a bathtub need not drain as quickly because it has a hundred times more storage.
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Old 04-01-2009, 08:07 PM   #9
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Re: Code Logic Question

Makes sense.

Thanks guys, learn something everyday!
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Old 04-02-2009, 12:20 AM   #10
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Re: Code Logic Question

OK, tubs have overflows, Lavs have overflows, shower's don't have overflows, and kitchen sinks don't have overflows. Was the question about logic?
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Old 04-02-2009, 12:43 AM   #11
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Re: Code Logic Question

Quote:
Originally Posted by macatawacab View Post
OK, tubs have overflows, Lavs have overflows, shower's don't have overflows, and kitchen sinks don't have overflows. Was the question about logic?
Yep
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