|(a) Installation and replacement of heaters. Pools
and spas constructed on or after the effective date of this subchapter
and pre-existing pools and spas replacing heaters shall comply with
the following requirements.
(b) Accessible on-off switch required. Electric power
to heaters shall be controlled by a readily accessible on-off switch
that is an integral part of the heater, mounted on the exterior of
the heater or external to and within 3 feet of the heater.
(1) Operation of the switch shall not change the setting
of the heater thermostat.
(2) Switches shall be in addition to a circuit breaker
for the power to the heater.
(c) Gas fired heaters. Gas fired heaters shall not
be equipped with continuously burning ignition pilots.
(d) Heated pool and spa cover requirements. Cover requirements
for outdoor heated pools and spas.
(1) Outdoor heated pools and outdoor permanent spas
shall have a vapor-retardant cover or other vapor-retardant means
that is as effective as a cover.
(2) Where more than 70 percent of the energy for heating,
computed over an operating season, is from a heat pump or solar energy
source, covers or other vapor-retardant means shall not be required.
(e) Heaters and hot water storage tanks. Heaters and
hot water storage tanks shall be listed and labeled in accordance
with Figure 25 TAC §265.197(e).
(f) Heater size. Heaters shall be sized in accordance
with the manufacturer's specifications.
(g) Installation of heaters. Heaters, except solar
thermal water heaters, shall be installed in accordance with the manufacturer's
specifications and the International Fuel Gas Code, International
Mechanical Code, International Energy Conservation Code, and NFPA
(1) A means shall be provided to monitor water temperature.
(2) A means to prevent public access to heater controls
is required. Public access to heater controls is prohibited.
(h) Solar thermal water heaters. Solar thermal water
heaters shall be installed in accordance with the International Mechanical
Code. Solar thermal collectors and panels shall be listed and labeled
in accordance with ICC 901/SRCC 100 or ICC 900/SRCC 300. Collectors
and panels shall be permanently marked in a post-installation readily
viewable location with manufacturer's name, model number, and serial
(i) Heater circulation system. Water flow through the
heater bypass piping, back-siphonage protection, and the use of heat
sinks shall be in accordance with the heater manufacturer's specifications.
Where required by the manufacturer, heaters shall be installed with
an automatic device that will ensure that the pump continues to run
after the heater shuts off for the time period specified by the manufacturer.
(j) Special requirements for fuel-fired and electric
appliances for spas. Components provided for water temperature controls
shall be suitable for the intended application and shall comply with
(1) Water temperature regulating controls shall be
listed and labeled as in compliance with UL-873 or UL 372. A means
shall be provided to indicate the water temperature in the spa; or
(2) Water temperature regulating controls that are
integral to the heating appliance and listed in accordance with the
end use appliance standard shall be considered in compliance with
(3) Water temperature at the heater outlets shall not
(k) Maximum spa water temperature. The maximum water
temperature of a spa shall not exceed 104°F.
(l) Registration with TDLR. All pool and spa heaters
with an input of 200,000 British thermal units (btu) or more shall
be registered and installed in accordance with the requirements of