The Model Aquatic Health Code

Gutter or perimeter overflow systems shall have a minimum finish height of two inches (51 mm) that meets the requirements of MAHC Section 4.2.1.8 and 4.2.1.8.1.

If dark colors in excess of what is required in this code are used for the POOL finish, these colors shall not extend more than 12 inches (305 mm) below the waterline.

POOL floors in areas less than three feet (0.9 m) deep shall have a slip resistant finish with an acceptable coefficient of friction.

Stainless steel, vinyl, PVC-P, or PVC panel and liner POOL finish systems shall be acceptable provided that the system is installed on top of approved materials and design requirements as listed within this section or approved by the AHJ.

If at any time the liner system is damaged or cut in such a way that its integrity is compromised, the POOL shall be shut down until the system is fully repaired.

Wood, sand, or earth shall not be permitted as an interior finish.

The interior finish of an INDOOR AQUATIC FACILITY shall be designed for an indoor relative humidity as not less than 80%.

INDOOR AQUATIC FACILITY building envelope construction shall include a vapor-retarder/insulation arrangement to assist in preventing the condensation of water on inside building surfaces under the coldest outdoor conditions based on the ASHRAE climate data for the project locale or nearest reporting city and the highest design indoor relative humidity.

Where a paint or coating serves as the vapor retarder of an INDOOR AQUATIC FACILITY, the paint or coating shall be applied so as to produce a permeability rating of 0.2 U.S. perm (11.4 ng·s^-1·m^-2·Pa^-1) or less.

The paint or coating shall be applied according to the manufacturer’s recommendations for use as a vapor retarder.

Where a perforated interior-finish material is used in an INDOOR AQUATIC FACILITY, as for acoustic effects, the perforated material shall not be considered to be a vapor retarder unless it has a listed permeability rating less than 0.2 U.S. perm (11.4 ng·s^-1·m^-2·Pa^-1).

For EQUIPMENT ROOMS, see MAHC Section 4.9.1.

For CHEMICAL STORAGE SPACES, see MAHC Section 4.9.2.

AQUATIC FACILITY AIR HANDLING SYSTEM design, construction, and installation shall comply with the 2011 ASHRAE Applications Handbook on Natatorium Design ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality, and/or applicable local CODES with additional requirements as stated in section MAHC 4.6.2.

AIR HANDLING SYSTEM design for CHEMICAL STORAGE SPACES shall conform to the International Mechanical Code or Uniform Mechanical Code, and either the International Fire Code or the Uniform NFPA 1 Fire Code, and any applicable local CODES.

Where air ducts are required, they shall be resistant to corrosion from the airborne chemicals.