Above-Ground Drainage (Leaving Cert Construction Studies): Flashcards
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Practise the cards
10 cards from this deck
What does above-ground drainage handle?
What does above-ground drainage handle?
Wastewater from domestic appliances before entering main drainage
How does a grease trap separate waste?
How does a grease trap separate waste?
Grease rises to surface, solids settle in bucket
Key feature of two-pipe system
Key feature of two-pipe system
Separates toilet waste from other appliance discharge
Two-pipe main stack diameter
Two-pipe main stack diameter
100mm
Single-stack system characteristic
Single-stack system characteristic
All appliances connect to single 100mm diameter stack
Wastewater branch pipe specifications
Wastewater branch pipe specifications
40mm dia, 3m max length, 18-90mm/m slope
Soil branch pipe specifications
Soil branch pipe specifications
100mm dia, 6m max length, 9mm/m slope
Stack within 3m of window requirement
Stack within 3m of window requirement
Must extend 900mm above window level
What is the function of traps in drainage?
What is the function of traps in drainage?
Water seal blocks air passage, prevents odours/gases
What causes self-siphonage?
What causes self-siphonage?
Waste pipe at full capacity creates negative pressure