4.2 Plumbing Materials

• Materials used in plumbing: plastic, metal, ceramic, concrete
• Properties of plumbing materials (corrosion resistance, thermal properties, malleability, ductility)
• Matching materials to their plumbing uses
• The importance of selecting the right material

• identify materials used in plumbing
• describe the properties of materials used in plumbing
• select materials for a specified plumbing use
• recognise the importance of materials used in plumbing

“Why is selection of materials important in plumbing?”

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1. Plumbing materials
   40 min · 1 practice tasks · quiz
   The materials used in plumbing (plastic, metal, ceramic, concrete), their properties, how to match a material to its use, and why choosing the right material matters.
2. Plastic pipes: PVC, CPVC and PPR
   40 min · 1 practice tasks · quiz
   The three plastics used for Kenyan pipework - what each is for, how it is joined, and why ordinary PVC must not carry hot water.
3. Galvanised iron (GI) steel pipes
   40 min · 1 practice tasks · quiz
   GI pipe is strong, zinc-coated steel that threads well. It still used on Kenyan supply and outdoor lines, but the inside can rust with time.
4. Copper pipes
   40 min · 1 practice tasks · quiz
   Copper resists corrosion, takes heat and is malleable enough to bend. Cost keeps it for hospitals, hotels and some solar work in Kenya.
5. Ceramic sanitary ware
   40 min · 1 practice tasks · quiz
   Ceramic is the material of WC pans, wash basins and sinks: hard, smooth and hygienic, but brittle if knocked.
6. Concrete drainage pipes
   40 min · 1 practice tasks · quiz
   Concrete is for large drains, sewers, manholes and culverts: strong, heavy, and available in diameters house plastic cannot match.
7. Properties of plumbing materials
   40 min · 1 practice tasks · quiz
   Corrosion resistance, thermal properties, malleability and ductility - the four properties that decide whether a material will do a plumbing job.
8. Plumbing fittings
   40 min · 1 practice tasks · quiz
   Elbows, tees, sockets, reducers, unions, valves and traps - the fittings that turn pipe into a system, matched to the pipe material.
9. Water tanks and Kenyan suppliers
   40 min · 1 practice tasks · quiz
   House tanks are usually food-grade plastic (Roto, Kentainers and others). Match tank, stand and fittings, and buy labelled potable goods from known suppliers.
10. Selecting plumbing materials
    40 min · 1 practice tasks · quiz
    Match each plumbing job to a material by its properties. Selection matters because the wrong choice fails, leaks, and can make drinking water unsafe.