Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: 3rd Term
Week: 10
Age: 15 years
Duration: 45 minutes
Subject: Building Construction
Curriculum Theme: Building Construction
Previous Lesson: Drainage System: Drainage Layout and System Arrangement.
Topic: Plumbing Installation: Fittings, Tools and Materials
Subject Matter: types of plumbing fittings in sanitary works, tools for plumbing installation, materials for fittings, identification of fittings such as elbow tee socket union adaptor, basic uses of fittings

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define plumbing fittings and tools.
State at least five types of plumbing fittings.
Mention three common materials used for plumbing fittings.
Explain the basic uses of various plumbing fittings and tools.

Affective Domain:

Appreciate the importance of selecting the correct fittings and tools for plumbing works.
Show interest in learning about plumbing installation safety practices.

Psychomotor Domain:

Identify common plumbing fittings from samples or charts.
List basic plumbing tools and state their functions.

Participate actively in class discussions about plumbing components.

Reference Materials

The following resources were used in planning this lesson:

Senior Secondary Education Curriculum for Building Construction (NERDC).
State Unified Scheme of Work for Building Construction SSS 1.
Building Construction for Senior Secondary Schools by E.A. Adedokun.

Instructional Materials

The teacher will teach this lesson with the aid of:

Assorted plumbing fittings (e.g., elbow, tee, socket, union, adaptor).
Charts showing different plumbing fittings and tools.
Basic plumbing tools (e.g., pipe wrench, hacksaw, measuring tape).

Rationale for the Lesson

This lesson helps pupils understand the essential components and equipment used in plumbing installations. Knowing different fittings, materials, and tools enables them to identify and appreciate their roles in providing water supply and waste removal in buildings, which is important for understanding how buildings function.

Prerequisite/Previous Knowledge

Pupils are expected to have basic knowledge of building components and the general concept of water supply and drainage in buildings.

Lesson Content/Board Summary

Plumbing Installation: Fittings, Tools and Materials

Introduction to Plumbing Installation

Plumbing installation involves the system of pipes, drains, fittings, valves, and fixtures installed in a building for water distribution, heating, and waste removal.

Types of Plumbing Fittings in Sanitary Works

Plumbing fittings are components used to connect different sections of pipes or to change the direction of flow. The following are common types of plumbing fittings:

Elbow: Used to change the direction of a pipe run, typically at 90 or 45 degrees.
Tee: A T-shaped fitting with three openings, used to combine or divide fluid flow.
Socket (Coupling): Used to connect two pipes of the same diameter in a straight line.
Union: A type of coupling that can be easily disconnected and reconnected, often used for maintenance.
Adaptor: Used to connect pipes of different types or materials, or to connect a pipe to a fixture.
Reducer: Used to connect pipes of different diameters.
Cap: Used to close off the end of a pipe.
Plug: Used to close off an opening in a fitting.
Nipple: A short piece of pipe, usually threaded at both ends, for connecting two other fittings.
Valve: Devices used to control or stop the flow of fluid.

Materials for Plumbing Fittings

Plumbing fittings are made from various materials depending on their application and the type of fluid they carry. Common materials include:

Polyvinyl Chloride (PVC): Lightweight, inexpensive, used for drainage and cold water.
Chlorinated Polyvinyl Chloride (CPVC): Similar to PVC but designed for hot water applications.
Polypropylene Random Copolymer (PPR): Used for hot and cold water supply, known for heat resistance.
Galvanized Iron: Steel pipes coated with zinc to prevent corrosion, used for water supply.
Copper: Durable, corrosion-resistant, used for water supply and refrigerant lines.
Brass: An alloy of copper and zinc, commonly used for valves and smaller fittings due to its durability and resistance to corrosion.

Tools for Plumbing Installation

Various tools are essential for cutting, joining, and securing pipes and fittings during plumbing installation. Some basic plumbing tools are:

Pipe Wrench: Used for gripping and turning pipes and fittings.
Adjustable Wrench: Used for tightening and loosening nuts and bolts.
Hacksaw: Used for cutting metal pipes.
Measuring Tape: Used for accurate measurement of pipe lengths.
Pipe Cutter: A specialized tool for cutting pipes cleanly and quickly.
Pipe Threader: Used to create threads on the ends of pipes for threaded connections.
Pipe Vice: Used to hold pipes securely while cutting or threading.
Spirit Level: Used to ensure pipes are installed horizontally or vertically.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and asks them to mention different parts of a building that help in water supply and waste disposal. The teacher then introduces the topic, “Plumbing Installation: Fittings, Tools and Materials.”
Pupils’ Activity: Pupils respond by mentioning pipes, taps, toilets, etc., and listen attentively to the introduction.
Learning Point: Pupils are introduced to the topic and relate it to prior knowledge.

Step 2: Explanation of Plumbing Fittings

Time: 10 minutes
Teaching Skill: Explanation/Demonstration
Teacher’s Activity: The teacher defines plumbing fittings and explains their general purpose. The teacher then displays various plumbing fittings (e.g., elbow, tee, socket, union) and explains that these are used to connect pipes or change flow direction.
Pupils’ Activity: Pupils define plumbing fittings and observe the displayed samples.
Learning Point: Pupils understand the definition and general function of plumbing fittings.

Step 3: Identification and Uses of Specific Fittings

Time: 10 minutes
Teaching Skill: Identification/Illustration
Teacher’s Activity: The teacher picks up each specific fitting (elbow, tee, socket, union, adaptor) and asks pupils to identify it. The teacher then explains the basic use of each fitting, using the displayed samples and charts.
Pupils’ Activity: Pupils identify the fittings and state their uses as explained by the teacher.
Learning Point: Pupils can identify and state the uses of common plumbing fittings.

Step 4: Materials for Plumbing Fittings

Time: 5 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher discusses different materials from which plumbing fittings are made (e.g., PVC, CPVC, galvanized iron, copper, brass) and briefly explains why different materials are used.
Pupils’ Activity: Pupils listen and note the different materials and their properties.
Learning Point: Pupils understand that fittings are made from various materials for different purposes.

Step 5: Plumbing Tools and Their Uses

Time: 5 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher displays basic plumbing tools like a pipe wrench, hacksaw, and measuring tape. The teacher asks pupils to identify them and then explains their specific uses in plumbing installation.
Pupils’ Activity: Pupils identify the tools and learn their functions.
Learning Point: Pupils can identify basic plumbing tools and state their uses.

Step 6: Class Discussion and Reinforcement

Time: 5 minutes
Teaching Skill: Question and Answer
Teacher’s Activity: The teacher facilitates a brief class discussion, asking pupils to recap what they have learned about fittings, materials, and tools. The teacher clarifies any misconceptions.
Pupils’ Activity: Pupils participate in the discussion, asking questions and providing answers.
Learning Point: Reinforcement of key concepts learned during the lesson.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Define plumbing fittings.
List three types of plumbing fittings you have learned today.
Mention two materials used for making plumbing fittings.
State one use for a pipe wrench.
What is the main function of an elbow fitting?

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 5 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key points of the lesson, emphasizing the importance of proper selection and use of plumbing fittings, materials, and tools. The teacher assigns homework for pupils to draw and label five common plumbing fittings.
Pupils’ Activity: Pupils listen to the summary and copy the homework.
Learning Point: Consolidation of learning and assignment of follow-up activity.

Lesson Keywords

Plumbing Fittings – Components used to connect pipes or change the direction of fluid flow.
Elbow – A fitting used to change pipe direction.
Tee – A T-shaped fitting used to combine or divide flow.
Socket – A fitting used to connect two pipes in a straight line.
Union – A disconnectable coupling for pipes.
Adaptor – A fitting used to connect pipes of different types or to fixtures.
Pipe Wrench – A tool used for gripping and turning pipes and fittings.
Hacksaw – A tool used for cutting metal pipes.

Differentiation

For pupils who grasp concepts quickly, they can be asked to research different types of valves used in plumbing. For those who need more support, the teacher will provide additional visual aids and simplified explanations, ensuring they can identify at least three fittings and two tools.

Note for teachers using this lesson plan

Ensure that actual samples of plumbing fittings and tools are available for pupils to see and handle if possible, as this enhances practical understanding. Emphasize safety when discussing tools, even if not demonstrating their use. Encourage pupils to ask questions to clarify their understanding.