Clutchcargo
Member
I'm trying to design my bathroom keeping plumbing code in mind. Where I'd like to put the toilet is 10' from the stack which prompted me to look into venting requirements.
How can there be so much discrepancy between the all the plumbing codes related to DWV of a toilet?
IPC - vent when it gets to the stack regardless of drain length; 6 feet to 60 feet, same requirements.
UPC - vent within 6'
MA vent within the standard pipe size requirements; 8' on a 3" drain, 10' on a 4".
I'm sure there are others as well.
Some reputable folks here say the toilet does not need to be separately vented because the siphon is meant to be cleared anyway and the vent is only to protect the siphon. Not saying that their saying to skirt the code but an intermediate location of a vent is technically not needed for the toilet to drain effectively.
It seems to me that the physics of this is something that we should have nailed down by now. How can IPC be correct for some parts of the country and not others?
I would love to see a test using transparent PVC of all these scenarios.
How can there be so much discrepancy between the all the plumbing codes related to DWV of a toilet?
IPC - vent when it gets to the stack regardless of drain length; 6 feet to 60 feet, same requirements.
UPC - vent within 6'
MA vent within the standard pipe size requirements; 8' on a 3" drain, 10' on a 4".
I'm sure there are others as well.
Some reputable folks here say the toilet does not need to be separately vented because the siphon is meant to be cleared anyway and the vent is only to protect the siphon. Not saying that their saying to skirt the code but an intermediate location of a vent is technically not needed for the toilet to drain effectively.
It seems to me that the physics of this is something that we should have nailed down by now. How can IPC be correct for some parts of the country and not others?
I would love to see a test using transparent PVC of all these scenarios.
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