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Questions and Answers
What are the two most common sizes of plastic pressure pipe used in domestic installations?
What are the two most common sizes of plastic pressure pipe used in domestic installations?
- 15mm and 22mm (correct)
- 20mm and 28mm
- 10mm and 16mm
- 25mm and 32mm
Push-fit fittings require inserts to reinforce the pipe.
Push-fit fittings require inserts to reinforce the pipe.
True (A)
What is the horizontal spacing requirement for a 22mm diameter pipe?
What is the horizontal spacing requirement for a 22mm diameter pipe?
- 0.3 m
- 0.8 m
- 0.5 m (correct)
- 1.0 m
What is the purpose of the stainless steel grab ring in a push-fit fitting?
What is the purpose of the stainless steel grab ring in a push-fit fitting?
Clips are used to prevent sagging, movement, and damage to the pipe and fittings.
Clips are used to prevent sagging, movement, and damage to the pipe and fittings.
A ______ is used to create a water-tight seal between the pipe and the fitting.
A ______ is used to create a water-tight seal between the pipe and the fitting.
What is the primary function of plastic interlocking pipe clips?
What is the primary function of plastic interlocking pipe clips?
Which of the following is NOT a style of push-fit fitting mentioned in the text?
Which of the following is NOT a style of push-fit fitting mentioned in the text?
A ______ clip is used when two pipes run in the same direction.
A ______ clip is used when two pipes run in the same direction.
Marking the fitting depth on the pipe is unnecessary when using push-fit fittings.
Marking the fitting depth on the pipe is unnecessary when using push-fit fittings.
Match the type of clip with its description:
Match the type of clip with its description:
What type of fitting is classified as reusable and requires a release key for removal?
What type of fitting is classified as reusable and requires a release key for removal?
Match the following push-fit fitting styles with their corresponding descriptions:
Match the following push-fit fitting styles with their corresponding descriptions:
Compression fittings for plastic pressure pipework require the pipe to be manipulated.
Compression fittings for plastic pressure pipework require the pipe to be manipulated.
What is the purpose of the olive in a compression fitting?
What is the purpose of the olive in a compression fitting?
Compression fittings rely on a copper or brass ______ which is compressed to create a seal.
Compression fittings rely on a copper or brass ______ which is compressed to create a seal.
Match the compression fitting types with their corresponding descriptions:
Match the compression fitting types with their corresponding descriptions:
Flashcards
Clipping distances
Clipping distances
Recommended spacing between clips for various pipe diameters to prevent sagging.
15mm pipe spacing
15mm pipe spacing
For a 15mm diameter pipe, horizontal spacing is 0.3m and vertical is 0.5m.
Plastic interlocking clip
Plastic interlocking clip
Clip that connects side by side, used for securing plastic pipes.
Double push-in clip
Double push-in clip
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Function of clips
Function of clips
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Push-fit fittings
Push-fit fittings
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Compression fittings
Compression fittings
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Type A compression fitting
Type A compression fitting
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Olive
Olive
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Main parts of compression fitting
Main parts of compression fitting
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Tightening the nut
Tightening the nut
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Clipping distance for plastic pipe
Clipping distance for plastic pipe
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Sagging in polybutylene pipe
Sagging in polybutylene pipe
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Common sizes of plastic pressure pipe
Common sizes of plastic pressure pipe
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Joining method for plastic pressure pipe
Joining method for plastic pressure pipe
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Purpose of pipe inserts
Purpose of pipe inserts
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Components of push-fit fittings
Components of push-fit fittings
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Importance of fitting depth
Importance of fitting depth
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First step in fitting a push-fit component
First step in fitting a push-fit component
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Second step in fitting a push-fit component
Second step in fitting a push-fit component
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Types of push-fit fittings
Types of push-fit fittings
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Study Notes
Level 1 Diploma in Plumbing Studies - Unit 110: Plastic Pressure Pipework
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Plastic Pressure Pipe Sizes: Plastic pressure pipe commonly used in domestic installations are 15mm and 22mm.
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Joining Plastic Pipe: The most common method for joining plastic pressure pipe is using push-fit fittings.
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Push-Fit Fittings: Push-fit fittings have a stainless steel grab ring for secure holding, and a rubber O-ring to create a watertight seal.
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Using Push-Fit Fittings: Essential when using push-fit fittings to insert reinforcing inserts into the end of the pipe before positioning the fitting, ensuring a strong and watertight bond.
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Fitting Depth: Manufacturers typically mark fittings to indicate the appropriate insertion depth. Precise marking of the pipe's insertion depth is critical to ensure a complete, leak-free seal.
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Fitting a Push-Fit Component: Step-by-step instructions include pushing the insert into the pipe, marking the fitting depth and checking that the pipe is fully inserted in the fitting.
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Styles of Push-Fit Fittings: Fittings are available in shapes like tees, elbows, couplings, and reducers.
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Release Keys: Push-fit fittings are classified as reusable and can be removed using release keys. Key types vary based on manufacturers.
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Compression Fittings: For plastic pipe, type A compression fittings are used which directly compress the olive onto the pipe, no pipe manipulation needed.
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Compression Fitting Components: Compression fittings have three main parts: the body, the olive, and the back nut.
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Compression Fitting Function: The back nut tightly compresses the olive onto the plastic pipe establishing a waterproof seal without deforming the pipe itself.
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Using Clips: For plastic pressure pipe, clips are used less frequently than copper pipe due to the flexibility of the material. Polybutylene is prone to sagging without proper clipping.
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Clipping Distances: Different pipe diameters require varying clipping distances to prevent sagging/movement.
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Types of Clips: Commonly used types of clips include interlocking, single push-in, double push-in with saddle clips, and nail-on.
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Clip Function: All types of clips prevent sagging, maintain pipe alignments and prevent damage to pipe and fittings.
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Description
This quiz covers the essentials of plastic pressure pipework as outlined in Unit 110 of the Level 1 Diploma in Plumbing Studies. Learn about pipe sizes, joining methods, and the importance of push-fit fittings for secure and watertight installations.
