RNPCP - CHAPTER 03 GENERAL REGULATIONS

2% - Recommended slope for honzontal drainage pipes.

1 % - For 102mm and 152.4mm diameter when impractical; and must be approved by Administrative Authority

0.5 % - For 203mm and larger diameter when impractical; and must be approved by Administrative Authority

2 pipe sizes - Vertical installation of double sanitary tees may be used when the barrel of the fitting is at least larger than the largest side inlet.

22.5o , 45o , 60o - Changes in direction shall be made use of or longer sweeps.

45o - The bottom of all pipe trenches deeper than the footing of any adjacent building or structure and parallel to it must be at least ________ degrees.

0.30m. - Minimum depth of building sewer below the finish ground level.

0.60m. - Maximum depth of building sewer below the finish ground level.

0.60m. - Clear height oftunnels above the pipe laid in a trench.

½ the depth of trench or 2.4m. - Maximum length of tunnels.

0.30m. - Trenches shall be backfilled in thin layers of ______ above the top of the pipe with clean earth

not less than 20mm/m or 2% - Drainage pipes shall be run in practical alignments & at a uniform slope between manholes of ______ toward the point of disposal.

No Drainage or Vent piping - shall be drilled & tapped for making connections thereto, and no cast iron soil pipe shall be threaded.

No Waste Connection - shall be made to a closet bend or stub of a water closet or similar fixtures.

encasing same with polyethylene sheath - All pipes passing through or under cinders or other corrosive materials shall be protected from external corrosion by _______ or in any other approved manner.

sealed with bitumen - Void between pipes & sleeves through concrete floors in the ground shall be appropriately ________.

at least 45degrees - The bottom of all pipe trenches deeper than the footing of any adjacent building or structure & parallel to it must be ______ therefrom, unless permission is granted by Administrative Authority.

under or within 0.6m of any building or structure, nor less than 0.3m below the finish ground surface - No building sewer or other drainage pipings or part thereof, constructed of materials other than that approved for use under or within the building, shall be installed _______.