11-15-2006, 05:21 AM
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Deity
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Join Date: Apr 2004
Location: Sharon, PA, USA.
Posts: 2,211
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The plumbing code says the floor must have a minimum pitch of 1/4" per foot downwards towards the drain but no portion of the floor may pitch more than 1/2" per foot.
The code also requires that the elevation of the threshold must be a minimum of 2" higher than the finished elevation of the drain therefore you would need a minimum of 4' from the drain opening to the doorway with a 1/2" per foot pitch or a minimum of 8 feet from the doorway to the drain with a 1/4" per foot pitch.
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