Current through Register Vol. 51, No. 19, September 20, 2024
A.
Except as provided in §B of this regulation, an owner of a recreational
pool, semipublic pool, or public spa shall ensure that circulation system
components, including skimmers, pumps, filters, multiport valves, adjustable
output rate chemical feeders, flow-through chemical feeders, chemical process
equipment, chlorine generators, ion generators, and other pool and spa
equipment comply with Circulation System Components and Related Materials for
Pools, Spas/Hot Tubs.
B. The
Secretary shall accept swimming pool, spa, or hot tub circulation system
components as meeting the requirements set forth in §A of this regulation
if these items are in the current published NSF listing of swimming pool, spa,
or hot tub circulation system components or a listing from organizations
accredited by the American National Standards Institute (ANSI) for the
certification of circulation system components.
C. Chemical Feeder and Process Equipment. An
owner of a recreational pool, semipublic pool, or public spa shall ensure that
the capacity of chemical feeder and process equipment is adequate to:
(1) Provide the minimum required disinfectant
residual to the pool or spa water, as required in Regulation .44A of this
chapter; and
(2) Establish
breakpoint when the combined chlorine level is over 0.2 ppm.
D. Chlorine Gas Feeders. An owner
of a recreational pool, semipublic pool, or public spa shall ensure that the:
(1) Equipment installation, and operation of
a chlorine gas feeder are in compliance with the American National Standard for
Public Swimming Pools, with the exception that the word "shall" is substituted
for the word "should", and the owner is required to comply with the
specifications of Appendix E; and
(2) Recirculated water is treated downstream
of the chlorine gas injection point to maintain the water's pH between 7.2 and
7.8.
E. Vacuum Systems.
(1) An owner shall ensure that a recreational
pool, semipublic pool, or public spa has a vacuum system for cleaning the pool
or spa floor.
(2) An owner of a
recreational pool, semipublic pool, or public spa may use skimmer outlet pipes
for vacuum purposes for circulation systems with four or fewer
skimmers.
(3) For circulation
systems with more than four skimmers or a gutter system, an owner of a
recreational pool, semipublic pool, or public spa shall ensure that a vacuum
system is provided that is separate from the skimmer or gutter
system.
(4) If vacuum fittings are
provided within a recreational pool, semipublic pool, or public spa, the owner
shall ensure that the fittings are:
(a)
Located at convenient locations approximately 1 foot below the water surface;
and
(b) Provided with flush
removable caps.
(5) When
the vacuum system is an integral part of the circulation system, an owner of a
recreational pool, semipublic pool, or public spa shall ensure that the vacuum
line connection is before the pump hair and lint strainer.
F. Carbon Dioxide Feeders. An owner of a
recreational pool, semipublic pool, or public spa shall ensure that a carbon
dioxide feeder system is:
(1) Installed and
maintained in accordance with the manufacturer's specifications;
(2) Located in a ventilated area;
and
(3) Secured to prevent damage
to the gas cylinder if the cylinder is subject to tipping.
G. Ozone Systems. An owner of a recreational
pool, semipublic pool, or public spa shall ensure that:
(1) An ultraviolet light ozone system is used
and installed according to Circulation System Components and Related Materials
for Pools, Spas/Hot Tubs;
(2) A
corona discharge ozone system is used and installed according to Circulation
System Components and Related Materials for Pools, Spas/Hot Tubs, and the
following requirements:
(a) The system is
designed to provide a minimum concentration of ozone generated to be 1.5
percent by weight;
(b) The ozone
gas is diffused through a static mixer into a contact column with a sidestream
flow of recirculated water equal to a minimum of 5 percent of the required
turnover rate;
(c) The system is
designed to provide a contact time of:
(i) 2
minutes when used in conjunction with a chlorine disinfectant; or
(ii) 1 minute when used in conjunction with a
bromine disinfectant;
(d) The system provides a minimum contact
time value of 0.5 milligram/liter in the contact column when the contact time
value equals the concentration of dissolved ozone in milligrams/liter times the
contact time in minutes;
(e) The
air feed, which is natural or oxygen enriched air, is filtered to remove
particulates and dehumidified to a minimum dew point of minus 60°C before
the ozone generating chamber;
(f)
An ozone gas feed line is ozone resistant;
(g) Valves are provided to control flow
through the system;
(h) Offgas
venting from the contact column is:
(i)
Equipped with an ozone destruct system that removes all ozone before release to
the atmosphere; or
(ii) Returned to
the main recirculation line when used in conjunction with a bromine
disinfectant;
(i) When
necessary, a foam suppression system is provided before offgas
venting;
(j) The oxidation
reduction potential of the sidestream after contact and before dissolved ozone
removal is a minimum of 650 millivolts;
(k) The dissolved ozone is removed from the
sidestream using granulated activated carbon before remixing with the
recirculated water when used in conjunction with a chlorine
disinfectant;
(l) The ozone
generating system shuts off if the water recirculating system shuts off or if
the vacuum is lost on the ozone gas output line;
(m) The ozone gas output is under negative
pressure or a vacuum;
(n) The ozone
generation area is ventilated at 2 cfm per square foot of floor area to prevent
the build up of excess ozone; and
(o) The recirculated water is treated to
maintain the pH between 7.2 and 7.8.
H. An owner of a recreational pool,
semipublic pool, or public spa may connect an equalization line for a skimmer
to the main drain line in a wading pool, or other pool that does not have
sufficient water depth, for the installation of the equalizer line through the
pool wall below the skimmer throat.
