Plumbing  ·  Level 4
Rainwater Harvesting System I
Chapter 4: Install rain water goods
📚 7 Topics
⚑ What you will be able to do

By the end of this chapter, you will be able to:

  • Wear the correct personal protective equipment safely, following all safety procedures.
  • Identify different water harvesting methods by interpreting working drawings.
  • Recognize various rainwater goods by reading and understanding working drawings.
  • Select the right tools and equipment needed for installing rainwater goods based on the specific task.
  • Set out rainwater goods correctly, following job requirements and building codes.
  • Install rainwater goods accurately, using the working drawings as your guide.
  • Carry out housekeeping safely and neatly, following workplace procedures.

Mastering these skills will help you install rainwater systems confidently and professionally, ensuring safe and effective water harvesting in real-world projects.

Compiled by: Mary Maina

Installing rainwater harvesting systems involves working at heights and with materials that require careful handling to ensure safety. For professionals engaging in this task across diverse Kenyan sectors such as hospitals, educational institutions, county offices, and farms, understanding and using personal protective equipment (PPE) correctly is essential. PPE minimizes risks associated with physical injuries, exposure to harmful substances, and environmental hazards during installation. This chapter introduces the critical role of PPE, detailing its types, correct usage, maintenance, and legal requirements within the Kenyan workplace context.

4.1 Personal Protective Equipment

Personal protective equipment is the frontline defense for workers installing rainwater goods, safeguarding them from injuries and health hazards. In Kenya, institutions like county referral hospitals and universities enforce strict PPE protocols to comply with the Occupational Safety and Health Act (OSHA) 2007. Proper PPE use not only protects the worker but also enhances productivity by reducing accident-related downtime.

4.1.1 Types of Personal Protective Equipment Used in Rainwater Harvesting Installation

Different PPE items protect various parts of the body during rainwater harvesting system installation. Selecting the appropriate PPE depends on the specific hazards encountered, such as working at heights, handling sharp tools, or exposure to dust and chemicals.

Head Protection

Helmets or hard hats are crucial to prevent head injuries from falling objects or accidental bumps against structures. For example, workers installing gutters on a school’s roof must wear helmets to protect against falling tools or debris.

Eye and Face Protection

Safety goggles or face shields guard against dust, splashes of chemicals like sealants, and flying particles during cutting or drilling. At a county government office installation site, eye protection prevents injury from debris generated when fixing downpipes.

Hand Protection

Gloves made from materials such as leather, rubber, or cut-resistant fabrics protect hands from sharp edges on metal gutters, rough surfaces, and chemical exposure. At a retail business installing rainwater tanks, gloves prevent cuts and chemical burns from adhesives.

Foot Protection

Steel-toed boots provide protection against heavy falling objects, sharp materials on the ground, and slippery surfaces. For instance, farm workers installing rainwater systems use boots to avoid puncture wounds from nails or sharp stones.

Four types of safety footwear commonly used in construction and engine
Four types of safety footwear commonly used in construction and engine (Source: INSTALL DRAINAGE SYSTEM NOTES )

Respiratory Protection

Masks or respirators are necessary when working in dusty environments or with chemical fumes from paints and sealants. Workers at a hotel installing rainwater goods in dusty outdoor conditions benefit from respiratory protection to prevent inhalation of harmful particles.

4.1.2 Proper Use and Wearing of PPE during Installation

Correct use of PPE is as important as having the equipment itself. Improper wearing or neglecting PPE compromises safety and can lead to severe injuries.

Inspection Before Use

PPE should be inspected for damage or wear before each use. For example, a SACCO’s maintenance team checks gloves and helmets for cracks or tears before starting installation tasks.

Correct Wearing

Each PPE item must fit properly and be worn according to manufacturer instructions. Eye protection should fit snugly to prevent dust entry, while helmets must be securely fastened to stay in place during work on roofs.

Integration of PPE

Multiple PPE items are often required simultaneously. Workers at a university installing rainwater goods on multiple floors must use helmets, gloves, eye protection, and boots together to ensure comprehensive safety.

Avoiding PPE Misuse

Using PPE incorrectly, such as lifting helmets off during breaks or wearing torn gloves, reduces effectiveness. County hospital workers are trained to maintain PPE use throughout the installation period to avoid exposure to hazards.

4.1.3 Maintenance and Storage of Personal Protective Equipment

Maintaining PPE in good condition extends its protective capabilities and ensures safety compliance. Proper storage prevents damage and contamination.

Cleaning Procedures

PPE should be cleaned regularly following manufacturer guidelines. For instance, at a Nairobi retail company, gloves and masks are washed or replaced to prevent contamination and degradation.

Repair and Replacement

Damaged PPE must be repaired by qualified personnel or replaced promptly. A cooperative installing rainwater tanks replaces worn-out boots and cracked helmets immediately to maintain safety standards.

Storage Conditions

PPE should be stored in clean, dry places away from direct sunlight and chemicals. At a county government office, PPE lockers are provided to protect equipment from environmental damage.

Record Keeping

Organizations often keep logs of PPE issuance, maintenance, and replacements to ensure accountability and compliance with safety regulations. This practice is common in large institutions like universities and hospitals.

4.1.4 Legal Requirements and Employer Responsibilities for PPE

Kenya’s OSHA 2007 mandates employers to provide appropriate PPE and ensure its correct use during hazardous tasks such as rainwater harvesting installation.

Provision of PPE

Employers must supply suitable PPE at no cost to employees. For example, a hotel management provides helmets, gloves, and boots to workers involved in rainwater system installation.

Training and Awareness

Employers are responsible for training workers on PPE use and risks associated with non-compliance. A county referral hospital conducts regular safety briefings before installation projects commence.

Monitoring and Enforcement

Supervisors must monitor PPE usage on-site and enforce compliance. At a university, safety officers conduct periodic checks to ensure all workers wear PPE correctly during installation.

Penalties for Non-Compliance

Failure to provide or use PPE as required can result in penalties from regulatory bodies such as the Directorate of Occupational Safety and Health Services (DOSHS). Businesses including banks and SACCOs are subject to inspections and fines if found negligent.

Practice Questions

  1. Explain five types of personal protective equipment required for installing rainwater harvesting systems and describe the specific hazards each protects against. (10 marks)

  2. Discuss the correct procedures for using and maintaining PPE during rainwater harvesting installation. (10 marks)

  3. Outline the legal responsibilities of employers in Kenya regarding PPE provision and enforcement in the workplace. (10 marks)

  4. Describe the consequences for workers and organizations if PPE is not used properly during installation activities. (5 marks)

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🔒4.2 Harvesting methods

Rainwater harvesting is a vital practice in Kenya, especially in regions facing water scarcity or unreliable municipal supply. Various methods enable organizations, from county hospitals to agricultural cooperatives, to capture and use rainwater efficiently. U…

🔒4.3 Identification of Rainwater Goods

Identifying the correct rainwater goods is a crucial step in the installation of a rainwater harvesting system. Rainwater goods refer to the components that collect, convey, filter, and store rainwater from catchment surfaces such as roofs. In Kenya, various i…

🔒4.4 Installation tools and equipment

Installing rainwater harvesting systems requires a variety of tools and equipment to ensure the components are securely and correctly fitted. In Kenya, professionals working in diverse sectors such as county government offices, hospitals, schools, and agricult…

🔒4.5 Setting out

Setting out in rainwater harvesting system installation involves marking and aligning the positions of components such as gutters, downpipes, storage tanks, and filtration units on site. This process is critical to ensure that water flows efficiently from catc…

🔒4.6 Installation

Installation of rainwater harvesting systems is a critical phase that determines the efficiency, durability, and safety of the entire system. In Kenya, where water scarcity affects diverse sectors such as healthcare, agriculture, and hospitality, proper instal…

🔒4.7 Housekeeping

Housekeeping in the context of installing rainwater harvesting systems refers to the systematic upkeep and maintenance activities necessary to ensure the installed components remain functional, safe, and efficient. In Kenyan workplaces such as county referral…

Chapter Summary

This chapter on installing rainwater goods begins by emphasizing the importance of using appropriate personal protective equipment to ensure safety during all phases of the work. It then explores various harvesting methods, highlighting the techniques used to collect and channel rainwater effectively. The identification of rainwater goods is covered next, providing detailed descriptions of the components involved in a rainwater harvesting system. The chapter proceeds to discuss the essential installation tools and equipment required for efficient and accurate assembly. Setting out procedures are explained to guide the precise positioning and alignment of the rainwater goods. The core installation process is then outlined, detailing the step-by-step approach to fitting gutters, downpipes, and other components securely. Finally, the chapter concludes with housekeeping practices to maintain a clean and safe work environment throughout the installation project.

Self-Assessment

🔒 PDFDownload this self-assessment, with answers

A. Written Assessment

  1. What is the primary purpose of wearing personal protective equipment (PPE) during rainwater goods installation? (2 marks)
  2. Identify three common methods used for harvesting rainwater. (3 marks)
🔒20 more in this section.

Chapter Examination Questions

🔒 PDFDownload these examination questions, with worked answers

SECTION A (40 Marks) - Answer ALL Questions

  1. Explain the importance of using personal protective equipment (PPE) when installing rainwater goods at a county referral hospital. (4 marks)
  2. Describe two common harvesting methods used in rainwater harvesting systems and their suitability for a university campus. (4 marks)
🔒18 more in this section.

Chapter Practical Activities

Practical 1: Set out rainwater harvesting system layout on site

Plumbing · Level 4
Rainwater Harvesting System I
PRACTICAL ASSESSMENT
TIME: 4 HOURS
⬇ PDFCandidate Instructions (Candidate Tool)

Type: Individual

INSTRUCTIONS TO CANDIDATE:
1.  You are required to perform the following task:
i.  Set out and mark positions for rainwater goods installation layout measuring 1800mm height and 100mm downspout diameter.
2.  You have been provided with the following resources for the practical task:
Tools & EquipmentMaterials
Measuring tape 30mReference pegs 600mm
Chalk line reelSteel nails 100mm
Marking paint
Spirit level 600mm
Plumb bob 500g
Spray marker pen
String line 50m
⬇ PDFResources Required (Cutting List)
S/NItemQuantity
1Measuring tape 30m1 Pc per Candidate
2Chalk line reel1 Pc per Candidate
3Marking paint 500ml1 Bottle per Candidate
4Spray marker pen1 Pc per Candidate
5Spirit level 600mm1 Pc per Candidate
6Plumb bob 500g1 Pc per Candidate
7Safety helmet1 Pc per Candidate
8Safety gloves1 Pair per Candidate
9Dustcoat overall1 Pc per Candidate
10Reference pegs 600mm6 Pcs per Candidate
11String line 50m1 Pc per Candidate
12Steel nails 100mm20 Pcs per Candidate
⬇ PDFAssessor Guide
Items to be EvaluatedMarks AvailableMarks ObtainedComments
TASK 1: Setting out rainwater harvesting system layout
Wore appropriate PPE (helmet, gloves, dustcoat) as per OSHA regulations
(Award 1 mark if all PPE worn or zero)
1
Interpreted working drawing correctly for downspout and gutter positions
(Award 1 mark for correct interpretation or zero)
1
Identified and established reference points on site based on the site drawing
(Award 1 mark or zero)
1
Measured and counted required materials and supplies based on working drawings
(Award 2 marks for accurate measurement and counting or zero)
2
Identified rainwater harvesting materials and supplies (wall clips, downspout, steel nails, brackets)
(Award 0.5 mark for each correct identification up to 1 mark)
1
Took measurements and marked out positions based on drawing: 1800mm downspout height, 100mm downspout diameter, 150x100mm gutter, 100x150x1000mm gutter length
(Award 1 mark for correct measurements and marking or zero)
1
Used tools correctly for marking out (measuring tape, chalk line, plumb bob, spirit level)
(Award 1 mark for correct use of each two tools or zero)
2
Set out string lines and fixed reference pegs accurately as per drawing
(Award 1 mark or zero)
1
Marked out downspout and gutter positions clearly on site
(Award 1 mark or zero)
1
Disposed of any waste or cuttings in line with environmental protection guidelines
(Award 2 marks or zero)
2
Cleaned and stored tools and equipment as per manufacturers' instructions
(Award 1 mark or zero)
1
Stored surplus materials and supplies properly as per manufacturers' instructions
(Award 1 mark or zero)
1
Completed task to at least 75% accuracy
(Award 2 marks for 75% or above completion, 1 mark for 50% completion)
2
Sub-Total17
PRODUCT CHECKLIST
Accuracy of marked out positions: 1800mm downspout height ± 2mm
(Award 2 marks for correct measurement or zero)
2
Correct diameter marking for 100mm downspout position
(Award 2 marks for correct marking or zero)
2
Correct layout dimensions for gutter length 1000mm and cross-section 150x100mm
(Award 2 marks for correct layout or zero)
2
Reference points and pegs set out square and level as per drawing
(Award 2 marks for squareness and levelness or zero)
2
String lines set out taut and aligned correctly
(Award 2 marks for correct string line tension and alignment or zero)
2
Marked positions clearly visible and unambiguous
(Award 2 marks or zero)
2
Overall completion and neatness of layout markings
(Award 3 marks for neat and complete layout or zero)
3
Sub-Total15
GRAND TOTAL32
ASSESSMENT OUTCOME:   ☐ Competent    ☐ Not Yet Competent (competent if at least 50%)

Practical 2: Installation of 100x150mm Gutters and 100mm Downpipes for Rainwater Harvesting

Plumbing · Level 4
Rainwater Harvesting System I
PRACTICAL ASSESSMENT
TIME: 5 HOURS
⬇ PDFCandidate Instructions (Candidate Tool)

Type: Individual

INSTRUCTIONS TO CANDIDATE:
1.  You are required to perform the following task:
i.  Install 2.4m long 100x150mm gutters and 1.8m high 100mm diameter downpipes.
2.  You have been provided with the following resources for the practical task:
Tools & EquipmentMaterials
Tin snips100x150mm Galvanized Iron Gutter Sections
Tape measure100mm Diameter PVC Downpipe
Spirit levelGutter Brackets
MalletDownpipe Straps
ScriberPop Rivets
Pliers2-inch Screws
Bench vice2-inch Concrete Nails
Ball peen hammerSilicone Sealant
Pipe wrench
⬇ PDFResources Required (Cutting List)
S/NItemQuantity
1100x150mm Galvanized Iron Gutter Sections2.4 meters per Candidate
2100mm Diameter PVC Downpipe1.8 meters per Candidate
3Gutter Brackets (150x100mm)5 Pieces per Candidate
4Downpipe Straps (100x100mm)3 Pieces per Candidate
5Pop Rivets20 Pieces per Candidate
62-inch Screws15 Pieces per Candidate
72-inch Concrete Nails12 Pieces per Candidate
8Silicone Sealant300 ml per Candidate
9Full PPE Set (Helmet, Gloves, Safety Boots, Overall)1 Set per Candidate
⬇ PDFAssessor Guide
Items to be EvaluatedMarks AvailableMarks ObtainedComments
TASK 1: Preparation and Safety
Wore full PPE including helmet, gloves, safety boots, and overall
(Award 1 mark for each correctly worn PPE item or zero)
2
Used tools and equipment correctly (tin snips, tape measure, spirit level, mallet)
(Award 1 mark for each tool correctly used or zero)
4
Sub-Total6
TASK 2: Interpretation and Measurement
Interpreted working drawing correctly showing gutter and downpipe locations
(Award 2 marks for correct interpretation or zero)
2
Measured and marked out gutter length of 2400mm and downpipe height of 1800mm within +/-2mm
(Award 2 marks for accurate measurements or zero)
2
Identified and counted materials required based on working drawing
(Award 2 marks for correct identification or zero)
2
Sub-Total6
TASK 3: Cutting and Assembly
Cut gutter sections and downpipe to specified lengths accurately
(Award 3 marks for precise cutting or zero)
3
Assembled gutter pieces including end caps and outlet correctly
(Award 3 marks for correct assembly or zero)
3
Jointed gutter and downpipe pieces using pop rivets and silicone sealant without leaks
(Award 4 marks for secure and leak-free joints or zero)
4
Sub-Total10
TASK 4: Mounting and Installation
Mounted gutter with correct gradient and firm gutter brackets
(Award 3 marks for proper mounting or zero)
3
Installed downpipe vertically plumb with secure downpipe straps
(Award 3 marks for plumbness and secure fixing or zero)
3
Checked for no leakages and constant water flow during water test
(Award 2 marks for successful water test or zero)
2
Sub-Total8
TASK 5: Finishing and Cleanup
Disposed of segregated waste materials as per environmental guidelines
(Award 2 marks for proper waste disposal or zero)
2
Cleaned and stored tools and equipment according to manufacturers' instructions
(Award 1 mark for proper care or zero)
1
Stored surplus materials safely as per manufacturers' instructions
(Award 1 mark for proper storage or zero)
1
Sub-Total4
PRODUCT CHECKLIST
Gutter length measured at 2400mm and downpipe height at 1800mm within +/-2mm tolerance
(Award 1 mark for each correct measurement or zero)
3
Gutter mounted with correct levelness and gradient to ensure water flow
(Award 3 marks for proper level and gradient or zero)
3
Downpipe installed plumb and firmly fixed with no loose joints
(Award 3 marks for plumbness and rigidity or zero)
3
All joints sealed properly with no leakages during water test
(Award 3 marks for leak-free joints or zero)
3
Firm installation of gutter and downpipe ensuring durability
(Award 2 marks for firm installation or zero)
2
Project completed to at least 75% as per working drawing
(Award 2 marks for 75% completion, 1 mark for 50% completion, or zero)
2
Sub-Total16
GRAND TOTAL50
ASSESSMENT OUTCOME:   ☐ Competent    ☐ Not Yet Competent (competent if at least 50%)
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🔒Installation of a 2000L Rainwater Storage TankPractical 3
🔒Jointing and sealing rainwater goods componentsPractical 4
🔒Set out and install a first flush diverter 600mm x 150mm x 150mmPractical 5
🔒Clean and Prepare Site for Rainwater Goods InstallationPractical 6
🔒Secure mounting brackets and supports for rainwater goods installationPractical 7
🔒Test rainwater harvesting system for leaks and flowPractical 8
🔒Demonstrate Safe Use of Installation Tools for Rainwater GoodsPractical 9
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Am I competent?

At the start of this chapter we promised you would be able to:

  • Wear the correct personal protective equipment safely, following all safety procedures.
  • Identify different water harvesting methods by interpreting working drawings.
  • Recognize various rainwater goods by reading and understanding working drawings.
  • Select the right tools and equipment needed for installing rainwater goods based on the specific task.
  • Set out rainwater goods correctly, following job requirements and building codes.
  • Install rainwater goods accurately, using the working drawings as your guide.
  • Carry out housekeeping safely and neatly, following workplace procedures.

Tick each one you can genuinely do.

So, are you there yet?

You're competent when you can confidently do 50% or more of what this chapter promised.

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