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Pool Technology Swimming pool
salt water chlorinators chlorination pools UK
Welcome to our range of Pool Technology swimming pool salt
water chlorinators & automatic PH regulators for all types & sizes of swimming
pool.
Poolsquad
Minisalt Salt water chlorinator for above ground pools
Justsalt Salt water chlorinator for in ground pools
Justsalt Duo Salt water chlorinator & pH regulator
JustpH automatic pH regulation
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An explanation of Salt Water Chlorination (SWC).
Salt Water Chlorination (SWC) is the name applied
to a system of swimming pool sanitation based on the electrolytic generation of
sodium hypochlorite – pool chlorine – from a dilute salt solution, usually
in the pool water itself.
HISTORY
SWC for swimming pools was developed from an industrial technique known as the
Chlor-Alkali Process.
In this process an electrical current is passed through an electrolytic cell
which has brine (a strong salt solution) as an electrolyte. At the cell anode
chlorine gas and a small amount of oxygen is evolved. From the cathode hydrogen
gas is evolved.
In cells where there is a membrane or diaphragm between the anode and cathode
the chlorine gas dissolves in the water on the anode side. The water becomes
acidic and saturated with chlorine. The chlorine gas then bubbles off from the
water. On the cathode side of the cell the hydrogen gas bubbles off leaving a
solution of sodium hydroxide. Further in the process it is possible to make
liquid chlorine by dissolving the chlorine gas in the sodium hydroxide solution
– this is liquid pool chlorine.
In cells where there is no barrier between the anode and cathode sodium
hypochlorite is formed directly as the products of the electrolysis mix. This
type of cell is used in SWC for swimming pools.
In the past industrial cell electrodes were made from graphite coated with
compounds containing lead. These materials were obviously unsuitable for use in
a swimming pool. However advances in electrode materials led to the use of
titanium coated with platinum, and later with noble metal oxide coatings. These
materials were suitable for use in a swimming pool. It is believed that Theodore
Romer developed the first SWC device for a home pool in Australia over 30 years
ago.
In the past 15 years the growth of this product has been extreme with over 90%
of new swimming pools in Australia coupled with 50% in France and 20% in the U.S
the products future is looking positive.
WHY USE SALT WATER CHLORINATION (SWC) ?
There are few pool sanitation systems that rival chlorine for both sanitary
efficiency and cost-effectiveness.
When SWC is used the pool is being sanitised by chlorine. It can be measured
with all the common test kits and its chemistry is well known. The difference is
that the chemicals need not be handled. Salt is added to the pool in a small
quantity – usually between 3 and 5 gram per litre depending on the equipment
that is used. Whenever the pool pump is run the chlorinator electrolyses the
water passing its cell and turns some of the salt into chlorine. When the
chlorine has been consumed it eventually reverts back to salt again and so it is
not lost. SWC is a recycling system where salt is only lost when water is lost
making it both economic and environment friendly. This is not to be confused
with a brine type chlorinator where salt is added to a tank and the brine
solution formed is then converted to a solution of hypochlorite. In this system
the hypochlorite is then injected into the pool meaning that the salt is removed
from the brine tank and placed into the pool. Salt is effectively “consumed” in
this process as it must be replenished in the tank.
SWC can also provide good water quality. Some by-products of chlorination –
chloramines – are responsible for the smell associated with chlorinated pools
and other things such as sore eyes and itchy skin. In a chemically chlorinated
pool chloramines are destroyed by adding even more chlorine to oxidise them. In
a pool using SWC these by-products are destroyed by the cell as the water
passes. This is due to a very high chlorine residual being present around the
cell anode prior to the mixing of the water after the cell. In all but the most
heavily used pools the chlorine smell may not be apparent at all.
There are many other reasons to use SWC including operating cost, convenience
and reduced chemical handling.
Salt chlorinators use vacuum salt (preferably fine) this can be bought at most
DIY centres. Just ask for salt! Chlorinators with PH control need liquid PH,
this may be PH increaser or PH reducer this depends on your local water. You can
test for this yourself using a pool test kit.
Contact Information
- Jacksons Leisure Supplies
Telephone
+44 (0151) 334 0222
FAX
+44 (0151) 343 0223
Many items can be picked up from our warehouse, ring for
directions
2 Woodway Court, Thursby Road, Croft Business Park, Bromborough, Wirral,
CH62 3PR, United Kingdom
- Electronic mail
- General Information: sales@jacksons-camping.co.uk
Webmaster: john@jacksons-camping.co.uk
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