If the waste line is 4 inches in diameter, the toilet can be as far as 10 feet from the stack. Maintaining these critical distances ensures the stack can handle the new toilet.Click to see full answer. People also ask, do you need a vent stack for a toilet?Under many older building codes, a vent stack (a pipe leading to the main roof vent) is required to be within a 5-foot (1.5 m) radius of the draining fixture it serves (sink, toilet, shower stall, etc.).Also Know, can you use a studor vent on a toilet? Studor, a brand name air admittance valve, can solve venting problems when open air venting pipes will not work. Studor vents allow air to enter the pipes while keeping sewer gasses or odor from escaping. After a toilet flushes the increased water flowing down the drain creates a negative pressure. Furthermore, where should a plumbing vent be located? Plumbing air vents also prevent sewer gases from entering the home and allow wastewater gas and odor to escape. Plumbing vent pipes are located on roofs, away from windows or air conditioning units, so that the fumes can easily dissipate.Can two toilets share the same vent?Most houses have more than one toilet, and if they are on the same side of the house, their waste lines can usually tie into the same stack. If they are on opposite sides, however, each may need its own stack. Since the stacks must be vented, this would mean two vent openings on the roof.
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