POOL FILTRATION
POOL FILTRATION
POOL FILTRATION
POOL FILTRATION
•
Swimming pools and spas are subject to constant contamination from foreign
matter brought in by swimmers, wind and articles used in and about the water.
Such contamination includes particles of dirt, organic matter, bacteria, algae, hair,
makeup, suntan and body oils, leaves, mineral residue from chemicals and debris.
•
Filtration is the mechanical process of removing this insoluble matter from
p
g
swimming pool and spa water. Pool water carrying particulate matter, solids and
debris is passed through filtering media that allow the water to return to the pool
clear. Water clarity is important for appearance, hygiene and safety.
•
The US National Sanitation Foundation recommends that pool water turbidity
(1/clarity) shall not exceed 0.5 NTU ( Nephelometer Turbidity Units). However for
short times during peak bather loading, this shall not exceed 1.0 NTU, and the pool
short times during peak bather loading, this shall not exceed 1.0 NTU, and the pool
filtration system shall be capable of returning this water to 0.5 NTU within 8 hours
following this peak use.
•
A common method of noting water clarity is to be able to see the pool drain clearly
from the pool deck or to see clearly a 2” disc with black and red quadrants through
15 feet (4.6m) or water.
•
Th f t
th t d t
i
t l it
fl
t
t f filt i
d
•
The factors that determine water clarity are flow rate, amount of filtering area and
effectiveness of filter media.
•
Once equilibrium is achieved, a six-hour turnover will result in 99% clarification
assuming that the filter medium is effective and the filter is properly sized to
accommodate the amount of contamination introduced into the water.
•
The quality of pool water should be equal to or better than the quality of drinking
q
y
p
q
q
y
g
water.
Number of times Pool
Volume is filtered
each 24 hrs
(turnovers per day)
Hours required to
Filter Pool Volume
(turnover period)
Percent Clarification
of Pool water after
equilibrium is
obtained
Number of days
required to attain
equilibrium
1
24
42
9
2
12
84
4
3
8
95
3
4
6
98
2
5
4.8
99
1
: 24833046 – 24831971
Fax: 24842389
Email: [email protected]
www.almeskpools.com
Kuwait’s first choice since 1982
