Unit I: Legends,
INSTALLING DRAIN LINES AND STACKS
The building's drain line connects to the building sewer pipeline and continues to the point where the stack is to rise vertically. The building's drain pipe must be the same size as the building sewer pipe.
Installing the Building Drain Line
Installing a drain line under a foundation floor. Use the following steps:
Installing a building drain line through a foundation wall. Use the following steps:
Installing the Stack
Sections of the stack. A combination of vertical pipes with fittings forms the stack in a plumbing waste system. It is used for waste disposal and venting. The main stack is composed of three sectionsthe soil stack, waste stack, and vent stack. A soil stack carries waste disposal from water closets. A waste stack carries waste disposal from all other fixtures. A vent stack provides air circulation throughout the waste system and allows for the release of sewer gases.
Placement of the stack. The stack runs in the building wall, up through each floor, and out through the roof. It is installed after the building framework is in place. Use the following steps:
Connections to the stack. Branch lines are for disposal of wastes. All rough-in horizontal branch lines in the waste system must slope ¼ inch per foot toward the stack.
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