PDX_13_Plumbing Details 2 Flashcards
Vertical cast-iron pipe extending from sidewalk level down to shut-off @ water-main connection.
Used by municipality to turn service on/off to bldg.
Accessed by a special wrench.
Curb box
Controls water (or gas) from public main to customer, located where service taps into main. Typically not accessible w/o digging up the street.
Corporation Stop
Type of pipe used most commonly for sanitary lines
Cast iron
Copper most commonly used for supply piping because:
Resistant to corrosion.
High-strength.
Low friction loss.
Small outside diameter.
Grades of copper pipe:
Thickest wall, comes in straight lengths, coils, and used for underground supply when greatest strength req’d
K
Grades of copper pipe:
Thinner walls and comes in straight lengths or coils, commonly used for most interior plumbing (most common typ)
L
Grades of copper pipe:
DWV
Drainage, waste, and vent piping.
Not subject to pressure.
(Rarely used)
Grades of copper pipe:
Thinnest, available straight length only.
Used @ low-pressure, like branch supply, chilled water, and drainage.
M
Grades of copper pipe:
From thickest to thinnest
KLM
DWV
Used when water is not corrosive, utilizes difficult screw fitting assembly joined mechanically w/ threaded collars
Galvanized steel
Schedule 40 is most common
Used in residential for supply piping, still restricted by some codes
Plastic
Plastic pipe used for hot water
Polyvinyl dichloride
PVDC
Plastic can expand __ x more than copper
3.5 times
Plastic pipe, black, used only for drain lines
ABS
Plastic pipe, white, used for cold supply
Polyvinyl chloride
PVC
