Plumbing Flashcards
Water boiling temp is:
212* F (100* C)
Water freezing temp is:
32* F (0* C)
Weight of one gallon is:
8.33 Pounds
Pressure of one column 1’ high
.433 psi
Volume of One cubic foot
7.48 gallons
What is a vent?
A vent is a pipe or opening that provides for circulation of air in a plumbing system and reduces the pressure on trap seals.
A vent system must do what?
(A.) Maintain amospheric pressure in the system.
(B.) Prevent retardation of flow and loss of the seal at the trap.
(C.) Prevent swere gas from entering the building.
A trap works by having an:
** = amount of atmospheric pressure on both sides**
- From the air inside the building
- From the air in the vent
Pressure in a trap must not vary more than (?) of water column or its effectiveness will be threatened.
1”
What is a drain?
Any pipe that carries waste in a building’s drainage system.
What is a drainage system?
Includes all the pipeing on premises that conevey sewage or waste to a legal point of disposal.
A building drain is:
The lowest portion of a drainage system that recieves all drainage from a building and conveys it to a building sewer.
A building sewer is:
located two feet outside one wall of the building
Drainage pipe may be any of the (9) following:
- Cast Iron
- Galvanized Steel
- Galvanized Wrought Iron
- Lead
- Copper
- Brass
- ABS
- PVC
- Other approved material
Cast Iron (information):
- May be used in all types of buildings for drainage (above or below ground / inside or outside walls)
- Cannot be used for acid waste systems
- Is available in 5’ and 10’ lengths
These types of jointing methods are allowed:
- bell and spigot piping w/ lead joints
- bell w/ plain end piping wih joints made with neoprene gasket
- pipe with plain ends (called no-hub) and joints made with a neoprene sleeve gasket surrounding by a stainless-steel retaining clamp
