Main Vent Stack Roof

Plumbing fixture vents solve this problem.

Main vent stack roof.

Through the stack sewer gases are carried up to the roof through vent lines. Click to enlarge any image. The termination point for the vent system is the roof of your house. All the faucets and water appliances in a house use this same system of drains pipes and vents.

Why plumbing air vents are important. All the vents connect to it through branch lines and it vents the main toilet the most important plumbing fixture in most houses. To allow only one vent stack and thus one roof penetration as permitted by local building code sub vents may be tied together inside the. The main vent is stack is often but not always a continuation of the soil stack which is a 3 or 4 inch waste pipe that extends vertically down from the uppermost bathroom to the sewer.

These vent pipes also interconnect in many instances. For the most part each plumbing fixture has a vent pipe associated with it. The main stack is the heart of the venting system. Stack vents are only used to vent sewer gas.

Drain pipes take the wastewater to the soil stack. The vent stack is the pipe leading to the main roof vent. If a blockage develops in the soil. 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.

The usual slope on the fixture drain piping is 1 4 of slope per 12 foot of horizontal. It channels the exhaust gases to the vent and helps maintain proper atmospheric pressure in the waste system. Basically larger piping diameter allows longer distances between a plumbing fixture and its vent stack. What is the plumbing stack vent.

Here we show the main building vent pipe the plumbing stack vent connecting inside plumbing drains to a vent pipe that extends above the building roof in order to let needed air into the drains and to vent sewer gases harmlessly above the building. If you can t put the main stack through the roof most local plumbing codes allow you to put it through a wall instead but there are conditions. If a plumbing fixture is located too far from the main building vent stack then its own drain pipe must have its own vent stack connection piping. The uppermost part of the waste stack that connects to the uppermost part of the roof is the stack vent.

All the waste lines have a cleanout which is a y shaped fitting that s accessible so that you can clean out any.