Trap Seal Loss Requirements

What happens if the water level in a trap is lowered to below the bend of the trap?

• The trap seal can be lost.

• The water will overflow the trap.

• The trap will become airtight.

• The trap will fill with debris.

If the trap seal is lost, what will enter the property until the trap seal is reinstated?

• Water

• Noxious smell

• Air

• Light

A basic but common reason for trap seal loss is that the seal water is ________ out.

• leaking

• boiling

• freezing

• evaporating

Which of the following could be a reason for trap seal loss due to leaks?

• The rubber seals are not watertight

• The plastic body of the trap is damaged

• Both A and B

• None of the above

What is a simple reason for trap seal loss commonly experienced in warmer climates and holiday properties?

• Freezing

• Evaporation

• Condensation

• Corrosion

According to the diagram, what is the average UK seal loss per week?

• 2.5mm per week

• 1.0mm per week

• 5.0mm per week

• 0.5mm per week

Why does the water in the trap seal evaporate out in appliances that are not used regularly?

• Due to the lack of use of the appliance, the water in the trap seal evaporates out.

• Because the appliance is exposed to direct sunlight.

• Because the trap is made of a porous material.

• Because the appliance is always running hot water.

All appliances rely on the seal water being topped up by regular use.

• True

• False

What causes 'wavering out' in a soil stack trap seal?

• Water pressure

• Wind passing over the top of a soil stack

• Temperature changes

• Blockage in the pipe

According to the passage, what can assist with the problem of wavering out?

• A wind cowl

• A water filter

• A pressure valve

• A heating element