327 IAC 8-3.2-11 - Flow rate and pressure in the water main
Authority: IC 13-14-8; IC 13-14-9; IC 13-15-1-2; IC 13-15-2-1; IC 13-18-3-1; IC 13-18-4-1
Affected: IC 13-11-2; IC 13-13-5-1; IC 13-18-2
Sec. 11.
(a) The
flow rate and the pressure requirements of subsection (b) shall be provided at
all service connections in a water main extension applicable to this
rule.
(b) At a flow rate equal to
the peak daily customer demand as determined in
327
IAC 8-3.3-2, the normal operating pressure in the
water main shall not be less than twenty (20) pounds per square inch (psi)
under all conditions of flow at the ground level at all points in the water
main when demonstrated in conformance with subsection (c).
(c) The flow rate and the pressure
requirements of subsection (b) shall be demonstrated to the commissioner with
either:
(1) a computer-based model;
or
(2) other hydraulic
calculations.
(d) In
addition to the requirements in subsections (a) through (c), the water supply
and water distribution system at noncommunity public water systems shall be
sized and constructed to deliver water at twenty (20) psi minimum pressure to
all fixtures and appurtenances during periods of peak water demand.
Notes
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