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Can the main drain be used as a vent?


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  • 3 weeks later...

Its not considered a vent untill its higher than the flood level of the highest fixture tied into it.

Don't you have horizontal wet vents in your area?

908.4 Bathroom Wet Venting.

908.4.1 Where permitted. Any combination of

fixtures within one (1) or two (2) bathrooms

located on the same floor level in dwellings and

guest rooms shall be permitted to be vented by a

wet vent. The wet vent shall be considered the

vent for the fixtures and shall extend from the

connection of the dry vent along the direction of

the flow in the drain pipe to the most

downstream fixture drain connection to the

horizontal branch drain. Only the fixtures

within the bathroom(s) shall connect to the wet vented

horizontal branch drain. Any additional fixtures shall discharge downstream of the wet

vent system and be conventionally vented.

908.4.2 Vent Connection. The dry vent

connection to the wet vent shall be an individual

vent or common vent for the lavatory, bidet,

shower, or bathtub.

908.4.3 Size. The wet vent shall be sized based

on the fixture unit discharge into the wet vent.

The wet vent shall be a minimum size of 2 inches

for 4 dfu or less, and 3 inches for more than 4 dfu.

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Works the same every place Ive ever done plumbing work anyway.

Of course around here we cant lay a san tee on its back the way they show in the picture.

And yes we can wet vent a toilet through a sink,thats about it though.

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What is the code for "around here"?

Sani-tees can't be on their side for drainage. What's the prohibition for using them on their side for venting?

How do you vent a toilet through a sink?

Bill, good questions. Thought it might just be me today.

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What is the code for "around here"?

Sani-tees can't be on their side for drainage. What's the prohibition for using them on their side for venting?

How do you vent a toilet through a sink?

you wet vent a toilet just like this.

City of omaha wont allow san tees to be used on side or back period,they want wyes used.

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