Residential Drainage, Waste And Venting Flashcards
Piping should be installed so their markings are ______ and _____
Facing up when installed in a trench and facing down when hung on hangers
When installing pipe underground, the ditch should be __________
Smooth and without any high spots
When placing any pipes under or through a foundation you should prevent the foundation from _______
Bearing any weight on the pipe
When back filling a trench the first _____ mm should be done by hand using small compatible aggregate
300mm
Can you use a sanitary T on its back to connect one fixture drain to another ?
Explain
No
A sanitary T on its back can only be used to connect a dry vent
Does ABS pipe expand more than PVC
Yes
Can you purchase a 2” expansion joint
Yes
Sizes 1 1/2 “ to 4”
The maximum trap arm length of a minimum size floor drain is _____ m or ______ feet
2.4 meters or 8 feet
2” floor drain
When can you have a floor drain trap arm only 2 pipe diameters in length?
A floor drain trap arm can be as close as 2 pipe diameters when it has its own vent, otherwise better not connected to a building drain, the trap arm is required to be at least 18” in length.
The size of a clean out is determined by the size of the________
Drainage pipe, but does not need to be larger than 4” for pipes over 4”
If you have a 4” building drain connected to a 3” soil stack, what would the size of the clean out be at the base of the stack?
Why?
4” because the clean out is for the building drain, and a clean out must be the same size as the drain it serves.
When you are uncertain if a bathtub trap will be accessible or non-accessible, what would be the solution?
Install a solid p trap, a clean out on the trap arm right after the trap and a clean out on the waste and overflow . This will allow for cleaning the trap and the arm after the trap
What is the cheapest method of venting?
Stack vent is the most economical method. This wet vent method allows one vent to serve many fixtures.
Can you have 2 basins tied together by a continuous waste system?
Yes. There can be 2 single compartment sinks or 2 basins on one trap using the continuous waste method, as long as limitations in distance are followed.
Can you have a 1 1/4” waste branch?
Table ____
Yes
Table 2.4.10.6.B states that a branch having 2 fixture units can flow through an 1 1/4” drain. In this case, 2 basins could be tied together, as in dual and continuous venting.
