Section 321.17. Drain tiles.

 

(1)   Determination of need.

(a) New construction.

1. Except as provided under sub. (2) , a complete drain tile or pipe system shall be installed around the foundation of dwellings under construction where groundwater occurs above the bottom of the footing.

2. For the purposes of this section, a complete drain tile or pipe system includes all of the following:

a. The drain tile or pipe installed inside and outside the foundation, except as allowed under s. SPS 321.17 (3) (d) 1. b.

b. Bleeders connecting the inside tile or pipe to the outside tile or pipe.

c. The sump pit or crock.

d. The discharge piping.

e. A pump or other means of discharging water to grade.

(b) Optional systems.

1. If a complete drain tile or pipe system is not required by natural conditions under par. (a) or by a municipality or registered UDC inspection agency, a partial drain tile or pipe system may be installed.

2. For the purposes of this section, a partial drain tile or pipe system includes a means of discharging water from the tile or pipe and may include any of the other elements under par. (a) 2.

(2)   Optional systems.

(a) New construction.

1. For new dwelling construction, a municipality or registered UDC inspection agency may determine the soil types and natural or seasonal groundwater levels for which a complete drain tile or pipe system is required.

2. For new dwelling construction, a municipality may not enact requirements for other than complete drain tile or pipe systems.

(b) Alterations to an existing dwelling. For an alteration to an existing dwelling covered by this code, a municipality may not require a complete drain tile or pipe system.

(c) Partial systems. Municipalities may allow partial drain tile or pipe systems for new dwellings under construction or existing dwellings.

(3)   Material and installation requirements for required systems.

(a) General. Complete drain tile or pipe systems required by natural conditions under sub. (1) (a) or by a municipality or registered UDC inspection agency shall comply with the requirements of this subsection.

(b) Basement floor slabs. The basement slab shall be placed on at least 4 inches of clean graded sand, gravel or crushed stone.

(c) Manufactured drainage systems. Manufactured drainage systems not meeting the requirements of this section shall be submitted to the department for review and approval prior to installation.

(d) Drain tile or pipe installation. Drain tile or pipe used for foundation drainage shall comply with the following requirements:

1.

a. Except as allowed under subd. 1. b. , the top of the tile or pipe shall be at or below the top of the footing.

b. Where the top of the footing is more than 4 inches below the bottom of the floor slab, tile or pipe is required on the interior of the foundation only and it shall be placed directly under the floor.

2. Drain tile or pipe shall have an inside diameter of at least 3 inches.

3. Drain tile or pipe shall have open seams, joints or perforations to allow water to enter.

4. Where individual tiles are used, they shall be laid with 1 / 8 inch open joints. Joints between tiles shall be covered with a strip of asphalt or tar impregnated felt.

5. The tile or pipe shall be placed upon at least 2 inches of coarse aggregate and shall be covered on the top and the side facing away from the dwelling with at least 12 inches of coarse aggregate that meets all of the following criteria:

a. 100% of the aggregate shall pass a 1-inch sieve.

b. 90-100% of the aggregate shall pass a ¾ -inch sieve.

c. 0-55% of the aggregate shall pass a 3 / 8 -inch sieve.

d. 0-5% of the aggregate shall pass a #8 sieve.

6.

a. Bleeder tiles or pipes shall be provided at no more than 8-foot intervals to connect the exterior drain tile or pipe to the interior drain tile or pipe.

b. Bleeder tiles or pipes shall have a minimum interior diameter of 3 inches.

c. Direct connection of the bleeders is not required if the intersection of the bleeder with the tile or pipe is covered with a membrane or fabric that prevents soil and fines from entering the system.

7. The drain tiles or pipe that lead from the footing tiles to the sump pit shall be laid at a grade of at least 1 / 8 inch per foot leading to the sump pit. The remaining drain tiles or pipe shall be level or graded downward to the line leading to the sump pit.

(e) Drain tile or pipe discharge.

1. Drain tiles or pipe shall be connected to the sump pit.

2. The sump pit shall discharge to natural grade or be equipped with a pump.

3. All other aspects of drain tile discharge shall be in accordance with the uniform plumbing code, chs. SPS 382 to 387 .

Cr. Register, November, 1979, No. 287 , eff. 6-1-80; r. and recr. Register, February, 1985, No. 350 , eff. 3-1-85; r. and recr. (3) (a) 3. and (4), Register, May, 1988, No. 389 , eff. 6-1-88; am. (2) (f), Register, January, 1989, No. 397 , eff. 2-1-89; r. and recr, (4) (c) 3., Register, August, 1991, No. 428 , eff. 9-1-91; cr. (5), Register, March, 1992, No. 435 , eff. 4-1-92; r. and recr. Register, January, 1999, No. 517 , eff. 2-1-99; am. (3) (d) 4., Register, March, 2001, No. 543 , eff. 4-1-01; CR 03-097 : am. (1) (b) 1., (2) (a) 1., and (3) (a) Register November 2004 No. 587 , eff. 1-1-05; CR 08-043 : am. (1) (a) 2. and (b) 2., renum. (3) (d) 1. to 4., 5. and 6. to be (3) (d) 2. to 5., 6. a. and 7., cr. (3) (d) 1., 6. b. and c. Register March 2009 No. 639 , eff. 4-1-09; correction in (1) (a) 2. a., (3) (e) 3. made under s. 13.92 (4) (b) 7. , Stats., Register December 2011 No. 672 .

Note

Means of discharging water include a sump pit, a crock or natural means of drainage to daylight. Microsoft Windows NT 6.1.7601 Service Pack 1 This situation will commonly occur with a walk-out basement. Microsoft Windows NT 6.1.7601 Service Pack 1 A #8 sieve has square openings of 2.36 mm or 0.09 inch. Microsoft Windows NT 6.1.7601 Service Pack 1 These specifications encompass aggregate sizes #6 and #67 per ASTM standard C 33. Of the two sizes, #6 is coarser. Microsoft Windows NT 6.1.7601 Service Pack 1 The following is a reprint of a pertinent section of the plumbing code: Microsoft Windows NT 6.1.7601 Service Pack 1 SPS 382.36 (8) Sumps and pumps. (a) Sumps. 1. `General.' All storm building subdrains shall discharge into a sump, the contents of which shall be automatically lifted and discharged, dispersed or used in accordance with sub. (4). Microsoft Windows NT 6.1.7601 Service Pack 1 2. `Construction and installation'. a. Except as provided in subd. 2. c. and d., an interior sump shall have a rim extending at least one inch above the floor immediately adjacent to the sump. Microsoft Windows NT 6.1.7601 Service Pack 1 b. A sump shall have a removable cover of sufficient strength for anticipated loads. Microsoft Windows NT 6.1.7601 Service Pack 1 c. Where a sump is installed in an exterior meter pit or elevator pit, the rim may be level with the floor. Microsoft Windows NT 6.1.7601 Service Pack 1 d. When a sump is provided with an airtight, solid cover. Microsoft Windows NT 6.1.7601 Service Pack 1 3. `Location'. All sumps installed for the purpose of receiving clearwater, groundwater or stormwater shall be separated from water wells by the applicable separation distances contained in chs. NR 811 and 812 , or as otherwise permitted by the department of natural resources. Microsoft Windows NT 6.1.7601 Service Pack 1 Note: See Appendix A-382.30 (11) (d) for material reprinted from s. NR 812.08 . Microsoft Windows NT 6.1.7601 Service Pack 1 4. `Size'. Except as recommended by the pump manufacturer, the size of each sump shall be no smaller than 16 inches in diameter at the top, 14 inches in diameter at the bottom, and 22 inches in depth. Microsoft Windows NT 6.1.7601 Service Pack 1 (b) Pumps. 1. `Size.' The pump shall be of a capacity appropriate for the anticipated use. Microsoft Windows NT 6.1.7601 Service Pack 1 2. `Discharge piping.' a. Where a pump discharges into a storm drain system, a check valve shall be installed. Microsoft Windows NT 6.1.7601 Service Pack 1 b. The minimum diameter discharge piping shall be based on the design flow rate of the pump and a minimum velocity of one foot/second. Microsoft Windows NT 6.1.7601 Service Pack 1