Hello Rulers of Pools,
I recently installed an ozonator along with a venturi to my Jacuzzi.
It is connected to the 3/4 inch water line that comes off after the circ pump & heater, which is in parallel with the larger line feeding the floor return and waterfall.
This is where the original ozonator was located (which was removed without my knowledge by Jacuzzi when they fitted a ClearRay UV a year or 2 ago).
I'm having flow rate issues.
It appears that the venturi is causing a restriction in the water flow, meaning it isn't generating enough suction to pull the ozone out of the ozonator effectively.
I tried connecting an ozone 'test tube' between the ozonator and venturi, and it only managed to discolour the tube the first few centimetres, not the entire length.
I've taken approx. flow rate readings using a bucket, and recorded:
c.6 L/10s (= c.36 L/min, = c.9.5 USg/min) unrestricted
c.2 L/10s (= c.12 L/min, = c.3 USg/min) after passing through the venturi.
It seems a bit daft that the venturi appears to be restricting the flow so much, it can't do its job of sucking out the ozone properly!
My make-shift solution is to connect an aquarium air pump between the ozonator and venturi to help partially pressurise the ozone into the venturi.
Another make-shift solution is to connect a water pump into the 3/4 inch line to help increase the flow rate there, thus increasing the venturi's suction.
Can anyone tell me if this is a usual problem when connecting ozonators?
Could it be that some venturis are better than others in this respect?
How does one normally install an ozonator to a spa?
I strongly suspect that spa dealers go and fit an ozonator and venturi to a spa and don't bother testing its performance.
So, no-one is any the wiser to the fact that the ozonator is hardly doing anything atall!
I realise that using the TFP / BBB method, devices like the ozonator and UV lamp are unnecessary for efficient hygiene.
However, I've already bought them, so I may as well use this situation as an experiment to see if I can get them set up and running as effectively as possible.
(As long as this doesn't require significant additional expenditure).
That way, I may be able to offer advise to people on their deployment, successful operation and usefulness in the future through real-world experience.
Thanks - D