CSA-B64.10 Selection and Installation of Backflow
PD1096 1977 National Building Code
Plumbing, Pipe Fitting, And Sewerage
National Plumbing Code Fo the Philippines
S T A N D A R D S S T A N D A R D S AS/NZS 3500.3.2:1998 National plumbing and drainage Part 3.2: Stormwater drainage - Acceptable solutions.
Section+3+-+Form+No+19+-+SWMS+High+Risk+Construction+-+Excavation+of+1.5mtr+July+2014
Drainage Systems Design Advice
