Utah Admin. Code R309-540-8 - Hydropneumatic Facilities for Maintaining Distribution System Pressure
(1) Applicability.
(a) Section R309-540-8 applies to a
hydropneumatic facility that maintains distribution system pressure for a
public water system.
(b) Sections
R309-540-5 through R309-540-7 apply to a pump, other than a well pump, that
supplies water under pressure to a hydropneumatic pressure tank.
(c) Section R309-540-8 applies to
air-over-water, diaphragm, and bladder hydropneumatic pressure tanks.
(d) Section R309-540-8 does not apply to:
(i) a surge protection tank;
(ii) pressure relief equipment; or
(iii) a pressure tank dedicated solely to
fire suppression.
(2) Number of Pumps. A public water system
using a hydropneumatic facility to meet the minimum distribution system
pressure requirements of Section R309-105-9 shall have at least two pumps
installed and in operation at the hydropneumatic facility, unless the
hydropneumatic facility is supplied solely by a well pump.
(3) Pressure Tank Certification. A
hydropneumatic pressure tank shall have:
(a)
NSF/ANSI 61 certification; and
(b)
ASME Boiler and Pressure Vessel Code certification.
(4) Use of Pressure Tank Volume for Water
Storage Sizing. A community water system may not use the volume of a
hydropneumatic pressure tank to meet the water storage sizing requirements in
Section R309-510-8.
(5) Pressure
Tank Located Below Ground.
(a) A below-ground
location for a hydropneumatic pressure tank and appurtenances shall meet the
requirements of:
(i) Subsection R309-540-5(2)
for flood protection and site drainage;
(ii) Subsection R309-540-5(3) for pump
station drainage and flooding prohibition;
(iii) Subsection R309-540-5(4)(b) for access;
and
(iv) Subsection R309-540-5(8)
for ventilation.
(b)
Electrical controls for a hydropneumatic pressure tank located below ground
shall be:
(i) located above grade;
and
(ii) protected from
flooding.
(6)
Operating Pressure Measurement. A means to measure the operating pressures of a
hydropneumatic facility shall be provided.
(7) Bypass Piping. Each hydropneumatic tank
shall have bypass piping and isolation valves to allow the tank to be removed
from service without disruption of water distribution.
(8) Pressure Tank Sizing. The minimum volume
of a hydropneumatic tank shall be sized to avoid continuous pump cycling as
recommended by the manufacturer.
(9) Air-Over-Water Pressure Tanks.
(a) An air-over-water pressure tank shall
have:
(i) an access opening;
(ii) a drain;
(iii) a means to measure pressure;
(iv) a means to measure the water level in
the tank;
(v) an automatic or
manual air blow-off;
(vi) a means
for adding air; and
(vii) pressure
operated start-stop controls for a pump.
(b) Air delivered by a compressor to an
air-over-water pressure tank shall be:
(i)
drawn from a point above ground;
(ii) free of contamination;
(iii) filtered; and
(iv) oil free.
(c) The volume of water remaining in an
air-over-water pressure tank at the lowest pressure setting shall provide a
water seal at the water outlet to prevent the leakage of air.
Notes
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