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Worksheets217 PP8 sanitation soil pipes
Total questions: 48
Worksheet time: 24mins
Sanitation systems must prevent which of the following from entering the building under working conditions?
Natural light
Foul air
Insects
Heat
What is a requirement for sanitation systems in terms of accessibility?
Be accessible for electrical maintenance
Be accessible for clearing blockages
Be accessible for water meter readings
Be accessible for aesthetic inspections
How should the size of the sanitation system be determined?
By the size of the building
By the number of residents in the building
By the expected flow at any point in the system
By the cost of the materials
Which document should be consulted for information on means of ventilation
BS465: Sanitary installations
Building Regulations part 'H'
BSEN12056: parts 1–5
Building Regulations part 'F'
What is the title of the document that deals with drainage and waste disposal
Building Regulations part 'F'
BS465: Sanitary installations
BSEN12056: parts 1–5
Building Regulations part 'H'
Which standard is referenced for sanitary installations
Building Regulations part 'F'
Building Regulations part 'H'
BSEN12056: parts 1–5
BS465: Sanitary installations
For gravity drainage systems inside buildings, which document is recommended by the Level 2 Technical Certificate in Plumbing?
BS465: Sanitary installations
Building Regulations part 'F'
Building Regulations part 'H'
BSEN12056: parts 1–5
Which documents restrict the systems installed and the materials used in above-ground drainage systems to ensure that hygienic conditions are maintained in dwellings and buildings at all times?
BS 8000-13 1989 and Building Regulations Document H3
Building Regulations Document H3 and BS EN 12056
BS EN 12056 and BS 8000-13 1989
Building Regulations Document H2 and BS EN 12506
What is the subject of the code of practice BS 8000-13 1989?
Installation of electrical systems
Workmanship on building sites for drainage and sanitary appliances
Guidelines for plumbing in residential buildings
Safety standards for construction materials
What determines the position of the soil and vent pipework in new-build installations such as multi-dwelling housing developments?
The preferences of the plumbing contractor
The position of the electrical wiring
The drain connection detailed on the Architect’s drawings
The location of the nearest water supply
Which of the following materials can be solvent welded using solvent cement to BS ISO 6209:2009?
PVCu
muPVC
ABS
All of the above
What is the base size for soil stack sizes in domestic situations?
50mm
75mm
100mm
150mm
Which of the following is NOT one of the main types of drainage system mentioned in the text?
Primary ventilated stack system
Secondary ventilated stack system
Ventilated branch discharge system
Tertiary recycling stack system
What is the name of the plumbing system that has a single pipe connected directly to the fixtures and a vertical vent pipe?
Primary ventilated branch
Secondary ventilated branch
Ventilated discharge system
None of the above
Which plumbing system includes a secondary pipe that acts as a vent for the fixtures?
Primary ventilated branch
Secondary ventilated branch
Ventilated discharge system
None of the above
In which system are the fixtures connected to a stack, with the stack itself being vented?
Primary ventilated branch
Secondary ventilated branch
Ventilated discharge system
None of the above
What is the function of the vent pipe in a standard domestic stack?
It takes all the effluent away from the building.
It allows air to enter the system to operate at atmospheric pressure.
It is used for water supply to the dwelling.
It collects rainwater from the roof.
What could happen if the pressure in the vent pipe varies?
The system will operate more efficiently.
It could lead to trap seal loss, allowing foul air to enter the dwelling.
The effluent will be recycled.
The water supply will increase.
What is the purpose of the soil pipe in a standard domestic stack?
It allows air to enter the system to operate at atmospheric pressure.
It is used for electrical wiring within the building.
It takes all the effluent away from the building.
It provides ventilation to the rooms.
What is the primary reason a primary ventilated stack does not require extra ventilation?
Because it is connected to the main sewer line.
Because the discharge branches from the appliances are closely grouped around the stack.
Because it uses a special type of pipe material.
Because it has an automatic pressure control system.
What is the purpose of maintaining a 2.5° gradient in the discharge branches?
To increase the water pressure
To prevent water from flowing
To maintain a 'self-cleaning' velocity
To create a blockage
Why is a 'self-cleaning' velocity important in plumbing systems?
It increases the risk of blockage
It decreases the efficiency of water appliances
It reduces the risk of blockage
It is required for heating the water
What is the min waste size requirement for a junior WC
32 mm
40 mm
75 mm
100 mm
What is the maximum length allowed for the waste pipe of a basin or bidet?
1.7 m
3.0 m
6.0 m
Not specified
What is the gradient range for the waste pipe of a sink?
18 mm/m
18–22 mm/m
18–90 mm/m
Not specified
According to the document, what is the trap seal depth for a washing machine or dishwasher?
50 mm
75 mm
100 mm
Not specified
For an adult WC, what is the required waste size?
32 mm
40 mm
75 mm
100 mm
What should be done if an installation exceeds the maximum length stated?
The gradient should be altered.
The pipe size should remain the same.
The next pipe size up should be used.
The installation should be redesigned.
If multiple appliances are connected to a single discharge pipe, what is the minimum pipe size that should be used?
32mm
40mm
50mm
75mm
What is the waste size of an adult WC that is fitted to a 100mm discharge branch?
75mm
100mm
32mm
50mm
Where are junior WCs often installed?
Adult schools
Offices
Nursery schools and infant schools
Public areas
What must be installed at the base of a soil stack to maintain its velocity when changing from a vertical to horizontal movement?
A) A short radius bend
B) A straight connector
C) A long radius bend
D) A trap
What can be used instead of a long radius bend in some systems to change direction from vertical to horizontal?
A) A single 90° connector
B) Two 45° connectors
C) A straight pipe
D) A trap
What problem did older systems experience without a long radius bend?
A) Increased flow rate
B) No change in performance
C) Problems with compression or back pressure for the discharge
D) Easier installation
Where is it good practice to position a rodding access in relation to the ground level at the base of the stack?
Just below ground level
At the midpoint of the stack
Just above ground level
At the top of the stack
What is the minimum distance from the drain invert level to the lowest connection of the soil stack in 'low rise' buildings (two storeys)?
450mm
750mm
500mm
600mm
For buildings up to how many storeys does the minimum distance from the drain invert level to the lowest connection of the soil stack increase to 750mm?
Two storeys
Three storeys
Four storeys
Five storeys
What is the maximum angle at which branch connections to the soil stack should be made to aid the flow of effluent?
67.5°
45°
87.5°
90°
For branch connections up to 75mm diameter, what is the required radius for a swept entrance?
50mm radius
25mm radius
45mm radius
200mm radius
For branch connections more than 75mm diameter, what is the required radius for a swept entrance?
25mm radius
45mm radius
50mm radius
200mm radius
What is the maximum permissible distance from the centerline of the soil stack to the centerline of a branch connection?
200mm
250mm
300mm
400mm
What is the minimum vertical distance required between an existing branch connection to a stack and any other connection installed opposite to it to avoid crossflow?
100mm
150mm
200mm
250mm
Why should the prevention of crossflow from one connection to another be practiced in plumbing?
To increase water pressure
To prevent trap seal loss and the crossflowing of effluent up the opposite connection
To reduce water consumption
To prevent pipe corrosion
What is the maximum diameter allowed for a small branch connection to a stack as shown in the diagram (c) Opposing waste pipes?
82mm
90mm
160mm
250mm
According to the diagram (a) Restriction connection area on stack, what is the minimum distance required between the center line of an opposed branch connection and the top of the stack?
90mm
160mm
200mm
250mm
In the diagram (b) Examples of permitted connections, what is the minimum distance allowed for an unopposed connection in the permissible area?
82mm
90mm
160mm
200mm
Referring to the diagram (a) Restriction connection area on stack, the center line of an opposed branch must not be below which point?
The bottom of the stack
The center line of the stack
The top of the stack
200mm above the bottom of the stack
with regard to opposing waste pipes, what is the range of distances within which no opposing branch connection of similar size is permitted?
82–160mm
90–250mm
200–250mm
90–160mm
