R309-540-8
R309-540-8. Hydropneumatic Facilities
Cite as Utah Admin. Code R309-540-8
(1) Section R309-540-8 applies to air-over-water, diaphragm, and bladder hydropneumatic pressure tanks.
(2) Section R309-540-8 does not apply to:
(a) a surge protection tank;
(b) pressure relief equipment; or
(c) a pressure tank dedicated solely to fire suppression.
(3) Where a hydropneumatic facility is the only means available for a PWS to meet the minimum distribution system pressure requirements of Section R309-105-9, the number of pumps shall meet the requirements in Subsection R309-540-6(2).
(4) A hydropneumatic pressure tank shall have:
(a) NSF/ANSI 61 certification; and
(b) ASME Boiler and Pressure Vessel Code certification.
(5) 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.
(6) A below-ground location for a hydropneumatic pressure tank and appurtenances shall meet the requirements of:
(a) Subsection R309-540-5(2) for flood protection and site drainage;
(b) Subsection R309-540-5(4) for pump station drainage and flooding prohibition;
(c) Subsection R309-540-5(5) for access; and
(d) Subsection R309-540-5(9) for ventilation.
(7) Electrical controls for a hydropneumatic pressure tank located below ground shall be:
(a) located above grade; and
(b) protected from flooding.
(8) Hydropneumatic facilities shall have means to measure the operating pressures.
(9) Each hydropneumatic tank shall have bypass piping and isolation valves to allow draining and maintenance of the tank without disruption of water distribution.
(10) The volume of a hydropneumatic tank shall be large enough to avoid continuous pump cycling as recommended by the manufacturer.
(11) An air-over-water pressure tank shall have:
(a) an access opening;
(b) a drain;
(c) a means to measure pressure;
(d) a means to measure the water level in the tank;
(e) an automatic or manual air blow-off;
(f) a means for adding air; and
(g) pressure operated start-stop controls for a pump.
(12) Air delivered by a compressor to an air-over-water pressure tank shall be:
(a) drawn from a point above ground;
(b) free of contamination;
(c) filtered; and
(d) oil free.
(13) 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.