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Old 01-17-2017, 01:35 AM   #1
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Multiple fixtures on 2" pipe


Is it possible to have a wash machine, shower and bathtub on a 2 inch pipe

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Old 01-17-2017, 09:14 AM   #2
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Re: Multiple fixtures on 2" pipe


I am guessing you are referring to a drain line?

Will they ever really be used concurrently?

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Old 01-17-2017, 09:56 AM   #3
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Re: Multiple fixtures on 2" pipe


Yes, a drain line.

It's possible for the shower/tub to be draining when the washer is draining.
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Old 01-17-2017, 10:13 AM   #4
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Re: Multiple fixtures on 2" pipe


In my state, yes. However, since codes vary state to state, I recommend you ask your local authority. I'm sure you are undersized in some states....

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Old 01-17-2017, 11:18 AM   #5
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Re: Multiple fixtures on 2" pipe


Laundry and a tub draining to the same line will need a 3" drain line and I believe a 2" vent.
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Old 01-17-2017, 06:11 PM   #6
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Re: Multiple fixtures on 2" pipe


Missouri follows the IPC code so your answer is once the washer drain has a second fixture the line will need to be sized to 3 inch. Also you will need to individual vent all fixtures involved.

406.3 Waste connection. The waste from an automatic clothes washer shall discharge through an air break into a standpipe in accordance with Section 802.4 or into a laundry sink. The trap and fixture drain for an automatic clothes washer standpipe shall be a minimum of 2 inches (51 mm) in diameter. The automatic clothes washer fixture drain shall connect to a branch drain or drainage stack a minimum of 3 inches (76 mm) in diameter. Automatic clothes washers that discharge by gravity shall be permitted to drain to a waste receptor or an approved trench drain.
FIXTURE DRAIN. The drain from the trap of a fixture to a junction with any other drain pipe.
FIXTURE BRANCH. A drain serving two or more fixtures that discharges to another drain or to a stack.

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