(a) A pump and
motor shall re-circulate the pool water.
(i)
A hair and lint strainer shall be located on the suction side of the
pump;
(ii) The strainer shall be at
least equal in size to the pump suction line; and
(iii) Strainers installed below water level
shall have a valve on each side to facilitate cleaning.
(b) The performance of pumps shall meet the
conditions of flow required for filtering and backwashing the filters against
the total dynamic head developed by the complete system.
(i) The pumps shall be capable of providing
design flow rates at no less than sixty (60) feet (1.83kg/cm²) of total
dynamic head.
(c) Pumps
shall be capable of pumping at a rate sufficient to turn over the total pool
volume within the periods of time specified in section 13(b) of this
chapter.
(d) Pumps on public
swimming pools shall comply with the NSFS-50, Circulation System Components and
Related Materials for Swimming Pools, Spas/Hot Tubs.
(e) Pumps shall be sized so as to pump the
flow required in subsection (c) of this section under the filter soil
conditions described in the following chart:
|
High rate sand filters
|
Filter soil conditions such as to create a fifteen
(15) psi (1.06kg/cm²) increase above that created using clean filter
media.
|
|
Rapid sand filters
|
Filter soil conditions such as to create an eight (8)
psi (.56kg/cm²) difference between influent and effluent pressures.
|
|
Diatomaceous earth filters
|
Filter soil conditions such as to create pressures or
vacuums at which manufacturer's recommend filter cleaning.
|
|
Cartridge Filters
|
Filter soil conditions such as to create a ten (10)
psi (.70kg/cm²) difference between influent and effluent pressures.
|
(f)
A spa pool shall have a two (2) pump recirculation system.
(i) One pump will provide the required
turnover rate, filtration and disinfection for the spa water; and
(ii) The second pump shall provide the water
for the hydrotherapy turbulence of the water.
