Utah Admin. Code R392-302-20 - Return Inlets
(1) The manager
shall ensure that:
(a) return inlets for
potable or treated water are:
(i) located to
facilitate:
(A) uniform circulation of water;
and
(B) a uniform disinfectant
residual throughout the entire pool; and
(ii) hydraulically sized to provide the
designed flow rate for each zone of multi-zoned pools based on the designed
turnover rate for each zone;
(b) if wall inlets from the circulation
system are used, each wall inlet is:
(i) flush
with the pool wall, and located:
(A) at least
five feet below the normal water level; or
(B) at the bottom of the vertical wall
surface tangent to the arc forming the transition between the vertical wall and
the floor of the pool;
(ii) except as provided in Subsection
R392-302-37(4)
and Subsection R392-302-38(1)(g),
spaced no greater than every ten feet around the pool perimeter; and
(iii) designed as a directionally adjustable
and lockable orifice with sufficient head loss to ensure balancing of flow
through each wall inlet as related to the other wall inlets such that:
(A) the return loop piping is sized to
provide less than 2-1/2 feet of head loss to the most distant orifice to ensure
equal flow through all orifices; and
(B) wall inlets are locked in place once
adjusted for uniform circulation.
(2) If floor inlets are installed in addition
to wall inlets, the manager shall ensure there is a minimum of one row of floor
inlets centered in the pool width with piping installed in accordance with
Subsection R392-302-19(3)
such that:
(a) individual floor inlets and
rows of floor inlets are spaced a maximum of 15 feet from each other;
and
(b) floor inlets are at least
15 feet from a pool wall with wall inlets.
(3) If floor inlets from the circulation
system are used, the manager shall ensure each floor inlet is:
(a) flush with the floor;
(b) placed at no more than 15 foot intervals
from other floor inlets;
(c) spaced
no more than 7-1/2 feet from the pool wall if there are no wall inlets on that
wall;
(d) designed such that the
flow can be adjusted to provide sufficient head loss to ensure balancing of
flow through all floor inlets; and
(e) designed such that the flow cannot be
adjusted without the use of a tool such that:
(i) the return supply piping is sized to
provide less than 2-1/2 feet of head loss to the most distant floor inlet to
ensure equal flow through all floor inlets; and
(ii) floor inlets are locked in place once
adjusted for uniform circulation.
(4) The local health officer may:
(a) exempt the inlet placement requirements
for inlet designs that can be demonstrated to produce uniform mixing of pool
water through a dye test;
(b)
reduce the head loss requirement if the manager can demonstrate that at least a
6:1 pressure ratio from orifice to the return loop is maintained; and
(c) require floor inlets to be installed in
addition to wall inlets if a pool has a width greater than 50 feet.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.