Procedure to dilute 33% Hydrochloric Acid
The Pool Lab ASP has a peristaltic acid pump which is designed for use with 16.5%
Hydrochloric Acid. Most pool shops stock pre-diluted 16.5% Hydrochloric Acid which is
suitable for use, but if only 33% Hydrochloric Acid is available then you will need to dilute
this 1:1 with fresh water prior to use.
NOTE: While 16.5% Hydrochloric Acid will produce considerably less fumes than 33%
Hydrochloric Acid, the diluted acid is still VERY DANGEROUS and VERY CORROSIVE.
Always handle acid with due caution and care.
IMPORTANT: The use of undiluted 33% Hydrochloric acid (or any other unapproved acid
types) with your Pool Lab peristaltic acid pump will void your Pool Lab equipment
warranties and may cause large pH fluctuations in the pool water. This can lead to health
and safety issues and may cause damage to the pool surfaces or other equipment which
will not be covered by any warranty.
Preparation:
– This procedure must be performed outdoors in a well ventilated area
– This procedure must be performed in a location where an accidental acid spill will
not cause damage to property or equipment
– Read section “Hydrochloric Acid (Muriatic Acid) Warnings” before proceeding
– Always wear appropriate protective clothing as shown below
– Where a SPA ONLY system exists, the total volume of diluted acid must be limited
to 5 Litres
– You will need either an empty Hydrochloric Acid Drum (5, 15 or 20 Litre), or a similar
container suitable for Hydrochloric Acid
– NEVER USE A CHLORINE DRUM OR ANY CONTAINER THAT HAS BEEN USED
FOR CHEMICALS OTHER THAN HYDROCHLORIC ACID
– You will need a measuring jug or similar (for measuring water only), and a plastic
funnel suitable for hydrochloric acid
Procedure:
– Using a measuring jug, half fill your empty container with fresh tap water.
eg. Measure out 7.5 Litres of water for a 15 Litre container.
– Using a plastic funnel, carefully top up the container to near full with 33%
Hydrochloric acid. Take care not to over fill the container, and leave some air space
(approximately 30 – 50 mm) above the liquid to allow for contraction / expansion of
the container.
Always wear appropriate protective clothing such as gloves, and eye
protection and a suitable respirator (Type E) when handling hydrochloric acid
or when servicing the acid dosing system
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