Floor Drain Vent

October 27, 2022

Floor Drain Venting For Better Occupant Health

This article deals specifically with drainage systems in toilets, both public and private, and how venting floor drains can be a new solution to address these concerns. A number of recent articles found on the web suggest that viral infections may be possible due to sewage systems allowing airborne viral particles to enter bathrooms causing illnesses (such as that of this LINK for example). Proper design of the plumbing system should prevent building waste water systems from entering an occupied space, however, p-traps can dry out and vent stacks can have gaps in buildings of any age, which would allow sewage gases from the building to enter a space. It also led to a new idea we came up with that could combine exhaust ventilation with a floor drain, effectively drawing all air down to the floor and away from the occupants' faces. And for an added bonus, the typical condensation problems of ducted ceiling fans would all go away because the condensation in a vented floor drain would already be contained in the drain line. Because a fan would serve to speed the drying of the p-trap, all of the same strategies for preventing a p-trap from drying out would apply, such as p-trap primers or a good old-fashioned mineral oil. Problems with plumbing backflows drawing waste water through the exhaust system could also have a number of solutions such as special fans to deal with this potential flow, or a secondary one-way drain. Among our team members, we considered the ability of backups to spill outward instead of into interior space is generally a net positive, but would require building maintenance personnel to perform regular checks for any problem that would not otherwise be apparent in space. himself. This would also be another solution to backed up drains, as the fan and outflow could simply be placed at a height above floor elevation which would prevent backflow through them. Not only would breaking convention and providing low exhaust systems in these spaces promote better overall health, it would also serve to create a more pleasant indoor environment as odors would similarly follow the exhaust path.

You might be wondering how the tiny floor-standing sink at the back could possibly need care, let alone ventilation. All drain systems, including floor sinks, are vented by the combined drain and vent system. For example, New York City plumbing codes for 2014 eliminated the need for vents if the floor-standing sink is within 15 feet of the main vent channel. Depending on your building codes, you can either connect the floor sink to the main sewer line or to a sump pit. Venting a Combination Venting System

Per the NYC 2014 plumbing code, combination vent systems must connect to a dry vent inside the structure or to a horizontal vented drain outside. According to the standards, the diameter of the vent should be half the floor sink pipe itself. The flow of the water line

Distance from the main ventilation stack

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Location of the drain pipe (Remember it is in the center with the sink)

Procedure

Depending on the size of the pipe and the dimensions of the sink, drill a hole in the floor.

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Floor Drain Vent

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Floor Drain Venting Requirements

Venting Of Floor Drains

We're still stuck with UPC here in WA, but I hear there are new methods for circuit vent floor drains that might help. If it's not the right one, you can probably find it on ICC safe online.