WorksheetsPP9 Sanitation
Total questions: 14
Worksheet time: 7mins
What is the maximum distance allowed from the invert to the floor level for a stub stack without requiring ventilation in England and Wales?
1.3m
1.5m
2m
6m
What is the purpose of a stub stack in plumbing?
To provide ventilation to the appliances
To allow appliances to be connected directly to the drain
To measure the water pressure
To prevent water from flowing back into the appliances
How can ventilation be acquired for a stub stack if required?
By installing a water pump
By using a wider pipe
By installing an air admittance valve (AAV)
By increasing the water pressure
What is the maximum allowable distance for a single appliance to be connected to a stub stack?
6m
12m
1.5m
2m
What is the maximum distance a stub stack can be installed away from the main vented stack (branch drain)?
3m
6m
10m
12m
Where must the vented stack always be installed in relation to the run?
At the middle part of the run
At the lowest part of the run
At the head or highest part of the run
Outside the building
What is the maximum height to the highest connection from the ground floor for a stub stack installation?
1.0m
1.3m
2.0m
2.5m
What is the maximum distance from the invert to the ground floor for a stub stack installation?
0.9m
1.3m
1.5m
2.0m
When installing an Air Admittance Valve (AAV), whose instructions must be followed?
The retailer's instructions
The manufacturer's instructions
The plumber's personal preference
General industry guidelines
What is required to protect an AAV from freezing?
Waterproof coating
Insulation
Heat tape
Nothing, AAVs are freeze-proof
How high must an AAV be installed above the highest spillover level?
At least 0.5m above
At least 1m above
At least 1.5m above
At least 2m above
What is the function of the air admittance valve in the plumbing system?
It prevents water from flowing back into the appliance.
It allows air into the stub stack, avoiding trap seal loss.
It measures the pressure within the plumbing system.
It filters the air entering the plumbing system.
What happens when the appliance is discharging in relation to the air admittance valve?
It releases air out of the stub stack.
It stops air from entering the stub stack.
It sucks air into the stub stack, stabilizing the pressure.
It seals the stub stack completely.
what is the height from the invert level to the air admittance valve?
1.3m
2.0m
3.3m
0.7m
