Sanitary Drainage Systems Overview

Which chapter covers the topic of Storm Drainage Systems?

Who contributed to the chapter on Domestic Water Heating Systems?

What organization is dedicated to the advancement of plumbing engineering?

Which chapter is concerned with Private On-site Wastewater Treatment Systems?

Who is listed as a technical reviewer for the plumbing engineering content?

What is the primary purpose of ASPE's technical publications?

Which of the following benefits do ASPE members receive through their membership?

Which type of valve is specifically designed to stop gas flow in the event of an excessive flow situation?

What is the purpose of a gas regulator relief vent?

How often does ASPE hold its conventions?

Which regions of the world are represented by ASPE members?

Which material is NOT typically used for piping in gas systems?

What is a key feature of ASPE's chapters?

What is the altitude derating factor used for?

Which of the following is a common consideration when selecting a gas meter?

Sanitary Drainage Systems

The primary purpose of a sanitary drainage system is to remove wastewater from plumbing fixtures and equipment to a designated disposal point.
A sanitary drainage system usually consists of various components including:
- Horizontal branches that connect fixtures to the vertical stack.
- Vertical stacks that carry the wastewater.
- A building drain inside the structure.
- A building sewer that extends from the building to the disposal point.
The system is designed to efficiently remove wastewater, considering factors like:
- The smallest possible pipe size to avoid clogging.
- Rapid removal to prevent solid waste buildup and excessive pressure.
- Minimizing noise generation.
The design incorporates vents and venting systems, which are explained in detail in Chapter 3 of the handbook.
Flow within stacks:
- A stack is a vertical pipe carrying discharge from fixtures like toilets, urinals, or other equipment.
- Water enters the stack from the drain through fittings like tee-wye or sanitary tee.
- The entry of water into the stack accelerates downwards under gravity, creating a sheet of water around the wall of the stack.
- This allows air to flow freely within the center of the pipe.
Stack capacities:
- Research conducted by Wyly and Eaton at the National Bureau of Standards determined the flow capacity of stacks based on different pipe sizes and rates of flow, providing valuable data for drainage system design.
Water flow in branches:
- Water flowing from the branch into the stack either mixes with the existing flow or deflects it.
- Deflection requires significant hydrostatic pressure in the branch to overcome the momentum of the downward flowing stream in the stack.

This quiz explores the components and design considerations of sanitary drainage systems as outlined in Chapter 3 of the plumbing handbook. It covers essential aspects such as the function of horizontal branches, vertical stacks, building drains, and sewers. Additionally, the importance of efficient wastewater removal and venting systems will be assessed.