Plumbing Systems and Sewer Requirements

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Questions and Answers

What is the purpose of expansion joints in plumbing systems?

To reinforce connections between pipes

To allow for movement due to temperature changes (correct)

To create a permanent joint between dissimilar materials

To connect two pipes with a rigid seal

Which method is NOT used for joining pipes made of different materials?

Cement Mortar Joint (correct)

Slip Joint

Fusion Welding

Welding/Soldering

What type of joint uses a rubber sealant to allow for movement?

Flanged Joint

Slip Joint

Hubless Joint

Expansion Joint (correct)

What is a characteristic feature of flared joints?

One end is flared to fit a special fitting. Signup and view all the answers

Which of the following joints is commonly used for fixture traps and drains?

Slip Joint Signup and view all the answers

What describes a hubless joint in plumbing?

Ends are wrapped with neoprene rubber and clamped. Signup and view all the answers

What is the main difference between short radius and long radius elbows?

Short radius elbows are designed for tight areas. Signup and view all the answers

Which joining method is specifically prohibited for new connections involving sewer lines?

Cement Mortar Joint Signup and view all the answers

What is the minimum slope required for horizontal drainage piping?

2% Signup and view all the answers

What type of waste pipe does not directly connect with the building drainage system?

Indirect waste pipe Signup and view all the answers

What is the purpose of a house trap in a plumbing system?

To prevent gas circulation Signup and view all the answers

Which fixture unit flow rate is equivalent to one cubic foot of water per minute?

7.5 gallons per minute Signup and view all the answers

How far must all cleanouts be located from the finished floor level (FFL)?

4 inches Signup and view all the answers

What defines an air gap in drainage systems?

A physical separation Signup and view all the answers

What type of vent pipe carries wastewater while also serving a vent function?

Wet vent Signup and view all the answers

Which of the following best describes a subsoil drain?

Transfers subsurface or seepage water Signup and view all the answers

What is classified as special waste in plumbing terminology?

Waste requiring special handling methods Signup and view all the answers

What does a fixture drain do?

Extends to the junction of the lateral drain Signup and view all the answers

What is the primary function of a vent stack in a plumbing system?

To circulate air and relieve atmospheric pressure Signup and view all the answers

Which type of vent is specifically designed to ventilate multiple fixture traps?

Unit vent Signup and view all the answers

What is the purpose of a branch vent?

To provide back ventilation for a single trap Signup and view all the answers

Which vent serves as a terminal for smaller vent pipes in a plumbing system?

Main vent (vent stack) Signup and view all the answers

In plumbing, how is caulking typically performed?

By wrapping oakum around the spigot and pouring lead Signup and view all the answers

What type of piping is typically threaded for joining fittings?

Galvanized iron pipes and other threaded pipe Signup and view all the answers

What is the characteristic of a circuit or loop ventilation system?

It ventilates two or more traps simultaneously Signup and view all the answers

What does the term 'soil stack' refer to in plumbing?

A waste pipe that also ventilates the system Signup and view all the answers

What type of fitting allows for connecting directly to another fitting without a pipe nipple?

Street Elbow Signup and view all the answers

Which fitting is designed to change the direction of pipe runs while connecting different diameters?

Straight Tee Signup and view all the answers

Which type of tee has a slight curve in the transition to channel flow towards the main line?

Sanitary Tee Signup and view all the answers

What does the term 'bullhead' refer to in the context of pipe fittings?

The largest socket on a tee Signup and view all the answers

Which fitting is utilized to join pipes of different materials or joining methods?

Adapter Signup and view all the answers

What is the primary purpose of a reducer/increaser in plumbing?

To connect a smaller pipe to a larger one Signup and view all the answers

What distinguishes a female adapter from a male adapter?

Female adapters have female threads, while male adapters have male threads Signup and view all the answers

What type of union consists of three pieces and is used to connect two non-turning pipes?

Ground Joint Union Signup and view all the answers

Which pipe fitting mounts a toilet to the floor and connects it to the drainpipe?

Closet Flange Signup and view all the answers

What characterizes a tapped tee?

Has an integrated threaded section Signup and view all the answers

Study Notes

Sewer Requirements

Plumbing fixtures must connect to public or private sewer systems.
If sewers are unavailable, buildings must connect to private sewage disposal systems.
House drains collect soil and waste discharges, while house sewers transport waste outside the building.

Key Components of Plumbing Systems

Septic Tanks: First stage in waste treatment, contained on-site.
House Trap: Inside building, prevents gas circulation through plumbing.
Horizontal Drainage Piping: Must slope at a minimum of 2% towards disposal points.
Fixture Unit: Defined as a discharge flow rate of one cubic foot of water per minute, equivalent to 7.5 gallons per minute (28.3 liters).

Cleanout and Drainage Systems

Maintain cleanouts within 4 inches of finished floor level for easy access.
Indirect Waste Pipe: Does not directly connect to building drainage; utilizes indirect waste receptors.
Flood Level Rim: The point for measuring air gaps in drainage; specifies minimum distance to prevent backflow.

Vents in Wastewater Systems

Main Vent (Vent Stack): Primary ventilation route to maintain atmospheric pressure in waste pipelines.
Branch Vents: Horizontal pipes facilitating airflow in smaller sections of the system.
Wet Venting: Combines waste flow with venting functions.
Circuit Ventilation: Allows multiple fixture vents to operate together.

Joints and Connections

Caulking: Involves lead and oakum connections for securing cast iron and plastic pipes.
Welding/Soldering: Common for connecting steel pipes without threads.
Rubber Ring Method: Utilizes rubber gaskets for straight pipe connections.
Expansion Joints: Accommodate movement due to temperature changes.

Types of Fittings

Elbows: Change the direction of the pipe; available in short and long radius.
Tee Fittings: Facilitate connections between three pipes; variations include reducing tees and sanitary tees.
Wyes: Feature angled branches to minimize friction compared to tees.
Adapters: Enable connections between different pipe materials or sizes.

Special Fittings

Closet Flange: Secures toilet to the floor and connects toilet drains.
Cap and Plug: Used to seal ends of pipes and nipples, effectively closing volumes in the system.
Flanged Union: Joins pipe ends with bolts, providing a strong, removable connection.

Overview of Plumbing System

Plumbing systems encompass drainage, venting, and water supply systems, ensuring efficient wastewater management.
Proper connection methods, venting, and equipment selection are critical for system performance and compliance with plumbing codes.

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Description

This quiz covers essential plumbing concepts including sewer connections and key components of plumbing systems such as septic tanks, house traps, and drainage systems. Understand the requirements for cleanouts and the significance of slope in horizontal drainage piping. Test your knowledge on best practices and definitions related to plumbing systems.