|
Home-pool filters
Sand
filter information
The sand filters
available in today’s market are very highly rated. Several layers of
sand and gravel are put into the tank of the filter and water goes
through several layers of the sand and gravel in the filtering
process. Even though most sand filters work best with several layers
of material in order to clean the water, two filtering layers work
fine with some models.
The sand used in the filters must be a certain size to obtain
maximum effectiveness. Sand particles which are too small may clog
up the filter, whereas sand particles that are too large will hinder
the effectiveness of the filter. It is important to ascertain the
measurements of sand that should be used with your filter. You can
check with the filter manufacturer or your manual to find out what
type of sand to use. Fill your tank with layers of coarse, medium
and fine gravel, then use a layer of silica sand on the top. The
silica sand on the top layer is usually between 0.35 and 0.45
millimeters in diameter and contains a uniform coefficient of 1.4.
Leave a gap between the sand bed and the over-drain; it should be
about half the depth of the filter bed. This space is called the
freeboard.
An alum based compound, which forms a gelatin type layer on top of
the sand is sometimes used to enhance the functioning of the sand
filters. This compound is called a flocculent. Instead of that
particular compound, you may use diatomaceous earth for this
function. After the unit has been filled with sand, you may add
one-half cup of DE per each three square feet of filter area in
order to form a DE compound and improve the functioning of the sand
filter.
Product guide
~ About our site
~ Resource links
~ pool filters
information ~
outdoors resources ~
pool filters and
related ~
outdoors related supplies and tools
~ swimming pool
filters guide |
Pool Filters
Fundamentals.com