Plumbing Code Numbers

• 0.392 - multiply the diameter of to get depth of equivalent area of rectangular gutter
• 0.8862 - multiply the diameter to get width of equivalent area of rectangular gutter
• 102mm/hr - rainfall intensity used around Manila and Environs
• 1.5x - minimum area of dome type strainers times the area of the outlet pipe
• 2x - minimum area of flat-surface type roof deck strainers for use on sun decks, parking decks times the area of the outlet pipe
• Outlet connections are inside-caulked or female screwed
• Cast-iron drain with integrally-cast water-stop ring around the outside of body - material for roof drains passing through the roof into the interior of a building
• 0.6m - Rainwater piping commencing 0.6 meter from the exterior of a building may be of suitable approved materials
• Steel pipe or cast-iron - material at the bottom of the conductor draining over the catch basin as protection from damage
• Gauge 26 Galvanized metal sheet - Rainwater downspout or conductor on the exterior side
• 150% - pressure test percentage used for the water pressure test
• 344.5 kpa - air pressure that may be substituted for the water test
• 15 minutes - duration that the test must withstand without leaking
• Air Test - shall be used when there is a reason to believe that a drainage or plumbing system has become defective
• 15 minutes - duration that pressure must be held without introduction of additional air
• 3 days - notification to administrative authority that the work is ready for inspection
• Pressure Test - shall ensure gastight and watertight connections
• Drainage and Venting System shall be tested with water or air
• At least the upper 3 meters height of the preceding section previously tested shall be tested again
• 15 minutes - duration that water is kept until inspection starts
• Every 5th floor levels must have yoke vent
• Size of yoke vent must be at least equal to soil stack or vent stack whichever is smaller
• 1m - yoke vent connection with the vent stack above the floor level
• Must connect with the drainage stack via wye branch
• 10 or more stories above the building drain shall be served by a parallel vent stack
• 0.15m - extension of vent pipe above the roof
• 0.30m - clearance of a vent pipe through roof away from any vertical surface nearby
• 3m - horizontal distance of vent opening from any openable window, door opening, air intake or vent shaft
• 0.9m - vertical distance above vent opening from any openable window, door opening, air intake or vent shaft
• 0.9m - horizontal distance of vent opening away from lot line, alley, and street boundary lines
• 0.15m - height extension of vent pipe above roof or fire wall
• 3m - horizontal distance of vertical vent pipes for outdoor installations to any part of roof that is used for other purposes
• 2.1m - vertical distance of vertical vent pipes for outdoor installations to any part of roof that is used for other purposes