General; Swimming Pool Filters; Hayward® Filters; Selection Of Filters And Installation - Hayward HCF302T Manual

2. General

NOTICE – Each country (possibly each state) will have its own standards for public and
private pools. It is the responsibility of the installer to be aware of these codes before designing,
specifying or installing any piece of equipment for a swimming pool.
2.1

Swimming Pool Filters

Filters are, without a doubt, the most important
accessory used in the treatment of swimming
pool water. Their purpose is to eliminate
suspended particles from the circulating water,
thus clarity of the water.
The principle operation consists of passing the
swimming pool water through a bed of sand
which will retain any particles that are
suspended in the water.
It should be kept in mind that the filtration
system consists of a number of elements, such
as metering equipment, pumps, pool shell
fittings and pipe work, which ensure the correct
suction and return flows that will affect the
resultant condition of the treated water.
The quality of filtration depends on various
factors, the size and shape of the sand, the
sand bed depth, characteristics of the sand such as granular size, density, etc. A most important
parameter is the water filtration rate. Other factors affecting the selection of a filter are the materials
used for its construction, the working temperature, and the operating pressure.
2.2 Hayward® Filters
Manufactured from proprietary resins and fiberglass, they are virtually corrosion-proof. The internal
fittings (diffuser and lateral system) are manufactured from PVC and ABS. They are unaffected by
salt water and are manufactured for a working pressure up to 50 PSI and a maximum working
temperature of 122° F.

2.3 Selection of Filters and Installation

2.3.1 Filter Characteristics

Choose the filter or filters that meet the local turnover time requirements. Remember it is
possible to add filters together to obtain the correct amount of filtration area required.
Note: when using multiple filters, they must be plumbed in parallel configuration. It is also
a good idea to oversize the surface area required by 10% or more, this will allow for
better water quality. When possible, use more than one filter in conjunction, this will
allow one filter to be serviced while one is still functioning.
6