4717.3850 Spa Pools


Published: 2015

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4717.3850 SPA POOLS.


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Subpart 1.

Applicability.

Spa pools must comply with parts 4717.0150 to 4717.3975, except as modified in this part.


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Subp. 2.

Recirculation rate.

The recirculation system must recirculate a water volume equal to the pool volume in 30 minutes or less, except that a minimum rate of 35 gallons per minute is required.


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Subp. 3.

Inlets.

The recirculation system must have at least two remote inlets to the pool.


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Subp. 4.

Main drain.

The main drain must consist of:

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A.

a grate-covered bottom opening at least 100 square inches in size; or


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B.

a bottom opening with an antivortex cover.



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Subp. 5.

Agitation system.

The agitation system must have a separate pump. If sidewall suction fittings are used, at least two inlets, remotely located, must be provided.


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Subp. 6.

Timer.

The agitation system must be controlled by a timer with the control switch accessible to pool users but at least five feet from the pool. The maximum time setting must be 15 minutes.


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Subp. 7.

Access.

Access to a spa pool must be provided according to this subpart.

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A.

Access to the pool must be provided by an unobstructed deck, at the pool elevation, which extends at least five feet from the pool around the entire perimeter.


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B.

Where a deck cannot be provided as specified in item A, a five-foot wide deck at the pool elevation must extend along at least 25 percent of the pool perimeter. The remaining perimeter must be one foot or less to a wall, partition, or other effective barrier to restrict access. The deck must provide complete and unobstructed access to the steps in the pool.


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C.

Where access is provided by sitting on the edge of a raised pool and swinging the legs into the pool:

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(1)

the deck requirement in item A or B must be met;


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(2)

the pool must be no less than 18 inches nor more than 20 inches above the deck;


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(3)

steps with equal risers and 12-inch minimum treads must be provided outside the pool which line up with the steps inside the pool; and


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(4)

the pool edge must not exceed 12 inches in width.




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Subp. 8.

Steps.

The requirements for steps in this subpart apply to spa pools.

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A.

Steps for access to an elevated spa pool must have a handrail and a finished surface that meets the requirements for decks in part 4717.3350.


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B.

Steps within manufactured spa pools may vary from the dimensions in part 4717.3250, subpart 2, if the commissioner determines that the design is safe.



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Subp. 9.

Disinfectant.

The disinfection residual must be maintained in accordance with part 4717.1750, subpart 4.


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Subp. 10.

Signs.

In addition to the signs required in parts 4717.1050, 4717.1250, 4717.1350, and 4717.1650 signs with the warnings in items A to C must be posted and plainly visible in the spa pool area.

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A.

Pregnant women, small children, or persons with heart disease, diabetes, high blood pressure, or low blood pressure should not enter the spa except under advice of a physician.


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B.

Avoid use while under the influence of alcohol or drugs.


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C.

Exposure may result in nausea, dizziness, or fainting. Observe a reasonable time limit.