PLUMBING

PI : Draw Pipe
MS : Mechanical Settings
SL : Split Element
PX : Plumbing Fixture
PA : Pipe Accessories (พวก Valve ต่าง ๆ)…..

MECHANICAL

AT : Air Terminal
ME : Mechanical Equipment
DT : Draw Duct
DA : Duct Accessories
FD : Flex Duct
DF : Duct Fitting