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18 Cards in this Set
- Front
- Back
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Minimum size for a building sewer connected to the public server is? |
4" Building drain can be 3" but sewers are always 4 |
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Fixture unit value of a bathroom group with a flush tank water closet |
6 |
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What's the minimum length of a 1.5" trap arm? Maximum length? |
Min length = 2x pipe size = 3" Max length = 1/4" drop per foot = 6' |
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What's the minimum slope for the 3" building drain? What about the 4" building sewer? |
3" is 2% or 1/50 4" is 1% or 1/100 |
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If a house has just 1 stack with a water closet attached, what's the minimum size of the stack vent? |
3". Each house must have at least one stack that is 3" |
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What if a house have two stacks, both with a bathroom group attached? What is the minimum sizes for those stack vents? |
One stack will be picked as the main stack and will have to be 3" all the way. The other stack vent, due to the attached water closet can be 2". |
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What determines the size of a trap arm? |
The size of the fixture outlet pipe |
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What is the maximum direction change for a kitchen faucet trap arm? What about a water closet? |
All fixtures but w.c. = 135 degrees Water closet = 225 degrees, since it needs an extra 90 degrees at the start of the fixture drain |
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What turns a waste stack into a soil stack? |
As soon as the fixture drain from a water closet joins the stack |
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What's the fixture outlet size for a basin sink? Kitchen sink? Floor drain on the 2nd storey? Clothes washer? |
Basin sink - 1.25" Kitchen sink - 1.5" Floor drain - 2" (not 3", that's in the basement) Clothes washer uses a laundry stand pipe - 2" |
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What's the minimum size of an air gap? |
1" or 25mm |
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What's the minimum length of a 3" floor drain trap arm? And why? |
It's not 2x pipe diameter as this is wet vented via the building drain. To prevent siphoning, it must be at least 18" |
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What is developed length, with regards to pipe measurements |
The length measured along the centre line of the pipe, including fittings |
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If a vent stack from the 1st floor joins the main stack vent on the 2nd floor, must it join above or below the 2nd storey lavatory sink fixture drain? |
Above, as it need to join above that lavatory sink's flood level rim |
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What allows for movement due to contraction in a waste stack? |
Expansion joint |
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Two ICV (individual & continuous vent), both on the first floor join up, they become? |
Branch vent |
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Two ICVs, one serving the first floor and the other serving the second floor join up, they become? |
Stack vent, since the one on the second floor drains through one storey, becoming a stack |
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Two ICVs, both serving the second floor join up, they become? |
Vent header, because both are stack vents and a vent header is when two or more stack vents and/or vent stacks join up |
