(A) Footing drains. Footing drains shall be installed on the exterior of all basement footings and around the outside perimeter of crawl spaces.
(1) Footing drains shall be bedded on two inches of washed gravel and all muck, silt or other materials removed, prior to placing the gravel.
(2) Footing drains shall be placed on the side of the footing. The top of the drain shall be below the top of the footing.
(3) The minimum inside diameter of footing drain conduit shall be not less than four inches. The conduit shall be rigid plastic perforated pipe, SDR 38, ASTM F840. Conduits shall be installed using the approved elbows, couplings and fittings.
(4) The draintile shall be covered with a minimum of 12 inches of washed gravel, one- half inch to three-fourths inch diameter, to a level three inches or more above the top of the footing. Foundation waterproofing shall not cover the required gravel.
(5) Window wells shall be provided with four inch nonperforated Schedule 40 rigid plastic riser pipe, connected to the footing drain by means of an approved rigid plastic eighth bend and tee, or be connected directly to a storm sewer. The bell end of the riser shall terminate three inches below the bottom of the window frame and shall be provided with a plastic grate. The riser pipe shall be securely fastened to the wall with two straps, one at the top of the riser pipe and one near the bottom. Coarse stone shall be used to fill the window well to a level adequate to cover the grate. See Graphic 8 in § 150.400.
(6) All window well drain pipes shall be plugged with manufactured plugs or other approved methods prior to backfilling.
(B) Storm sewers. Where a public storm sewer or a stub is available on the same side of the street as the residence, footing drains shall be connected to the public storm sewer or stub by gravity or through a sump pump, in the following manner.
(1) A six-inch building storm sewer service line shall be installed from the public storm sewer or stub to within ten feet of the foundation. This six-inch line shall be rigid, nonperforated PVC, SDR 38 or six inch vitrified clay pipe with slip seal joints, ASTM Designation C700/78.
(2) The storm drain lateral from the storm sewer or stub shall be bedded on three inches of washed torpedo sand or pea gravel, and subsequently covered with sand or pea gravel, prior to any backfilling. There shall be a minimum of three inches of cover over the pipe.
(3) Private storm and sanitary sewers are to be in separate trenches unless the sanitary sewer is of service weight cast iron pipe.
(4) Connections to the public storm sewer shall be made to a stub if provided, or a manhole or basin, or the sewer may be tapped and the connection made with a manufactured saddle. All area drains shall be provided with a catch basin before connection to the public sewer. See mud basin, Graphic 4 in § 150.400.
(5) (a) Footing drains or sump pumps serving footing drains only may be connected to a road drain if a storm sewer connection is not available on the same side of the street as the property served. When footing drains are served by a sump pump two-inch plastic pipe may used from a point outside the foundation to the road drain. The connection to the road drain shall be made by removing a section of the road drain pipe and replacing with a tee, into which the plastic pipe shall be connected. Two-inch coil plastic pipe shall be placed 42 inches below grade. Rigid plastic pipe shall be bedded on four inches of compacted sand. Sand shall also be placed to the spring line of the pipe.
(b) All draintile systems shall terminate in a city storm sewer or road drain when available.
(6) (a) All sump pumps shall be provided with check valves.
(b) All sump pump basins shall be a minimum of three feet deep with fiberglass construction, with a hub and sealed cover. See Graphic 7 in § 150.400.
(C) Use of storm sewer. It shall be unlawful to deposit sanitary sewage, industrial waste, oil, grease, flammable liquids or any waste material into a public or private storm sewer system.
(Prior Code, § 9-194) (Ord. 94-11B, passed 4-21-1994) Penalty, see § 150.999