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Township of Grosse Ile, MI
Wayne County
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Table of Contents
Table of Contents
The location and enclosure of any pool shall be such that no hazard exists for pool users. The minimum distance from the nearest part of the pool water shall be as follows:
A. 
Six feet horizontally to any building wall or fence.
B. 
Ten feet horizontally from any overhead electrical or telephone wire to the water's edge. Under no circumstances shall wires of any kind cross over the water surface.
C. 
Twenty-five feet horizontally to any private water well casing or 75 feet to any public or semipublic water well casing, unless a shorter distance is approved by the enforcing official.
D. 
Three feet horizontally to any sewer; there shall be 10 feet horizontally to a septic tank and tile field or other similar treatment facility, provided the water level in the pool is one foot or more above the ground surface elevation of the treatment facility.
E. 
Three feet to any underground water, electrical, telephone, gas or other pipes and conduits, except for parts of the swimming pool system.
The buried portion of the pool suction piping shall be 10 feet or more from any sanitary sewer pipe or sewage disposal system. The clearance may be reduced to five feet if the suction line is encased in a watertight pipe maintained under pump pressure, or drained as approved by the enforcing official, or the suction line buried less than four inches below grade.
A. 
No swimming pool shall be constructed or maintained unless such swimming pool is entirely enclosed by a building, wall and/or fence. The minimum height of all parts of the fence or wall, including gates, shall be 48 inches measured on the outside of the fence or wall upward from the highest adjacent ground. Any gate shall be equipped with a lock and key. Said fence shall be designed and constructed so that the pool is not readily accessible to children by climbing or entering through the fence openings. Fence material shall contain openings not larger than two inches nominal size nor material that provides ready footing for climbing. The fence around a swimming pool must be a minimum of six feet from property lines and principal buildings except where the entire rear yard is fenced.
B. 
A permanent aboveground pool which has a structure intended to provide self-fencing shall satisfy the fencing requirements of this chapter if it provides: a walkway not less than 20 inches in width completely around the water's edge and at least three feet above grade; and the self-fencing shall be at least three feet high above the walkway; and a foldup stairway or gate which must be locked when residents are away from the home or when the pool is not in use. The self-fencing shall make the pool inaccessible to children by climbing or entering through the fence openings.
Every swimming pool shall be filled and maintained with potable water.
One or more water pipes or hose connections shall be available to the pool. There shall be no cross-connections between the potable water system and the pool circulation system. The water supply to the pool shall be protected against backflow or back-siphonage of water by means of a fixed air gap of six inches or more above the highest possible water level or by a properly installed vacuum breaker. If a hose connection from a sill cock or other plumbing fixture is to be used, an acceptable vacuum breaker shall be installed on the hose thread of the sill cock or fixture. No over-the-rim fill spout will be accepted unless located under a diving board or installed in a manner as to prevent any hazard.
Facilities shall be provided for disposing of all pool drainage and wastewater to the community sanitary sewer system or in some other manner approved by the enforcing official. There shall be a six-inch air gap between the pool discharge line and the sanitary sewer.
Pool equipment and material shall be subject to evaluation and acceptance by the enforcing official before installation.
The pool and surrounding area shall be constructed and arranged in such a manner that no water shall return from the deck to the pool. Wastewater shall not be allowed to create a nuisance or to overflow onto adjoining property.
No surface or roof drainage shall be permitted to enter the pool.
Pool floor and walls shall have a cleanable, light-colored, and impermeable surface. The pool floor and the deck shall be skid resistant. Where the water depth is less than five feet, maximum cove radius shall be eight inches.
There shall be no hazardous projections or low over-water construction in the pool or the pool enclosure which could trap or injure bathers. The pool shall be shaped so that all parts of the pool can be observed from a single vantage point on the pool deck.
Every pool shall have at least one acceptable ladder or set of steps.
Pool lights, if provided, shall be shielded so as to direct the light away from adjacent premises.
Water treatment equipment shall be installed above grade, except that it may be installed in a properly drained residential basement, cellar, or other approved structure. Any accessory building shall comply with applicable requirements of zoning and building codes.[1]
[1]
Editor's Note: See Ch. 40, Building Construction, and Ch. 285, Zoning.
A walkway or deck of concrete or other approved impervious material shall be constructed around the perimeter of the pool and shall be at least three feet wide.
A. 
The minimum number of filtered water inlets shall be determined as follows:
Number of Inlets
Pool Perimeter
(feet)
1
0 to 60
2
61 to 120
3
121 to 180
4
181 to 240
B. 
Each of the minimum required water inlets shall be at least 10 inches below the highest overflow line and at least 10 feet from any other inlet or from any skimmer, unless otherwise approved by the enforcing official.
One or more outlets shall be placed at the deepest point in every pool for circulating the pool water and for draining the pool. The effective area of the drain grating shall be at least four times the area of the outlet pipe.
Unless a continuous overflow weir and gutter is installed around the pool, one or more surface skimmers shall be provided. There shall be one skimmer for each 800 square feet or any fraction thereof, which shall operate continuously while the pool water is being circulated and which shall automatically adjust for vertical variations in the water level of three inches or more. A noncorrosive basket strainer accessible from the deck of the pool shall be an integral part of the surface skimmer mechanism. All skimming devices in a pool with a maximum depth exceeding five feet shall be recessed or flush with the wall of the pool.
A flow-reducing valve shall be installed on the discharge side of the pump. Valves shall be installed wherever necessary for proper operation and maintenance of the circulation system. Provisions shall be made for draining the filtration equipment.
The pump shall have sufficient capacity at maximum anticipated hydraulic head to circulate the pool volume each 12 hours and to supply the required backwash rate to any one filter. Unless hydraulic analysis demonstrates otherwise, each pump shall supply the required filtration rate at a total head of at least 50 feet for any sand or anthracite filter system and 60 feet for a diatomite filter system. The motor horsepower rating shall be determined for maximum total head conditions at a twelve-hour pool volume turnover time.
A pump connecting to a pressure filter shall be equipped on its inlet side with a noncorrosive hair and lint strainer. The ratio of the open strainer area to the open area of the suction piping shall be at least four to one.
A pressure gauge of appropriate range shall be installed on the piping between the filter(s) and pool unless otherwise approved by the enforcing official.
A. 
One or more filters shall be provided.
B. 
The total effective filter area in square feet shall be at least equal to the volume of the pool in gallons divided by 2,160 (three gallons per minute per square foot for twelve-hour turnover). Each filtering system shall be provided with a sight glass or visible discharge. The influent shall be applied to the filter media surface in a manner which prevents direct turbulent discharge against the media.
C. 
All pressure filters shall be equipped with an air release at the high point in the system. If an automatic device is installed for this purpose, there shall be a manual valve for testing its effectiveness.
D. 
The shell containing the filter media or elements shall be constructed so as to provide satisfactory strength and freedom from corrosion, and shall be installed in a manner to prevent settling or upset.
A. 
Each pressure sand filter shall be provided with backwash water at a minimum rate of 12 gallons per minute per square foot of effective surface area.
B. 
Filter sand shall be uniformly graded silica material, with effective particle diameters between 0.45 and 0.55 millimeters and with uniformity coefficient less than 1.75. The sand shall be free of clay, organic matter, and water-soluble material and no less than 20 inches in depth, with a twelve-inch or greater freeboard.
C. 
Graded gravel or crushed anthracite shall be used to support the filter media and shall be free of organic and water-soluble material. It shall be graded by size and separately leveled in layers. The total depth of the graded gravel shall not be less than 16 inches.
A. 
Each anthracite pressure filter shall be provided with backwash water at a minimum rate of 12 gallons per minute per square foot of effective surface area.
B. 
The top 20 inches of crushed anthracite shall be used to support this filter media and shall be as specified in § 241-35C.
Diatomite filters shall be provided with backwash water at a rate adequate to cleanse all filter aid from the elements. A precoat funnel or other feeding device shall be provided.
There shall be a suction cleaner outlet connected to the pump suction piping between the pool and the hair and lint strainer, to permit use of a suction cleaner or other acceptable device for cleaning the entire pool area.