3. TRAPS
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The purpose of a trap under an appliance is to stop the noxious (unpleasant) smell
from the soil stack entering the property. They attach to the underside of the waste
fitting on the appliance.
There are many styles of traps to suit various situations.
The majority are made from polypropylene; others are made from brass and copper,
or are sometimes chrome plated.
The jointing methods are mainly push-fit, and more commonly compression using a
rubber seal.
4. TRAPS
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Where a trap diameter is 50mm or above, the trap seal must
be a minimum of 50mm deep like a WC.
Being a larger diameter they contain more water, so become
more difficult to lose the trap seal due to induced siphonage,
waving-out or compression – cohesive property of water.
The trap seal depth is the retained depth of water stopping
the noxious smell entering the property.
18. VENTILATION
IN BUILDINGS
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Proper ventilation keeps the air fresh and healthy indoors. Like the
lungs, homes need to be able to breathe to make sure that fresh air
comes in and dirty air goes out. Air indoors can build up high levels
of moisture, odors, gases, dust, and other air pollutants.
three purposes of ventilation
Provide a continuous supply of fresh outside air. Maintain
temperature and humidity at comfortable levels. Reduce potential fire
or explosion hazards.
19. BENEFITS OF
VENTILATION ?
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Good ventilation in the home has several benefits
•Regulates air flow in your home. ...
•Positive impact on health and wellbeing. ...
•Helps to control household temperature. ...
•Reduces risk of condensation, residue and mould. ...
•Expels air impurities and odours.
