Page 105 - Vessel Sanitation Program 2018 Construction Guidelines
P. 105
VSP 2018 Construction Guidelines
29.3 Return Water
All water returning from a RECREATIONAL WATER FACILITY must be directed
to the compensation or make-up tank or the filtration and DISINFECTION system.
29.4 Compensation or Make-Up Tanks
Ensure that 100% of the water in the compensation or make-up tanks passes through
the filtration and DISINFECTION systems before returning to the RECREATIONAL
WATER FACILITY. This includes any water directed to water features in
RECREATIONAL WATER FACILITIES.
29.5 Approved
Install recirculation, filtration, and DISINFECTION equipment that has been
APPROVED for use in RECREATIONAL WATER FACILITIES based on NSF
International or an equivalent standard.
29.6 Centrifugal Pumps
Ensure that pumps used to recirculate RECREATIONAL WATER FACILITY water
are centrifugal pumps that they are self-priming or prime automatically. Flooded end
suction pumps are permitted if suitable for the application.
29.7 Skimmers or Gutters
Install surface skimmers or gutters capable of handling 100% of the filter flow of the
recirculation system.
If skimmers are used instead of gutters, install at least one skimmer for every
37 square meters (400 square feet) of pool surface area.
29.8 Hair and Lint Strainer
Provide a hair and lint strainer between the RECREATIONAL WATER FACILITY
outlet and the suction side of the pumps to remove foreign debris such as hair, lint,
hair pins, bandages, etc.
Ensure the REMOVABLE portion of the hair and lint strainer is corrosion resistant
and has holes no greater than 6 millimeters (1/4 inch) in diameter.
29.1 Filters
29.1.1 Particle Size
Use filters designed to remove all particles greater than 20 microns from the
entire volume of the RECREATIONAL WATER FACILITY within the
specified TURNOVER rate.
29.1.2 Cartridge or Media Type
Use cartridge or media-type filters (e.g., rapid-pressure sand filters, high rate
sand filters, diatomaceous earth filters, gravity sand filters). Make filter sizing
consistent with American National Standards Institute (ANSI) standards for
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