Secondary Aquarite T-15

djw

Gold Supporter
Apr 17, 2010
216
Colleyville, TX
Hi,

Long lead-up to a short question:

I have a fairly large pool (40K) and I have been considering putting in a second Aquarite T-15, in addition to the one I already have to give me

a) some "excess capacity" for chlorination so I can use a VS pump to cut down or run time and
b) provide some redundancy when a cell inevitably goes out - usually at the worst time.

- While the T-15 can just about keep up with my summer chlorine use, it requires my single speed pump to be run almost all day. Expensive to run a SS pump like this.
- With that much run time I typically need a new T-15 cell about every three years on average. Of course they always begin to poop out during the high demand periods. If one works I can just double my pump run time until I replace the bad cell. But I have redundancy in the system now and don't have to go fetch alternative chlorination sources.
- Over the years I have come to grips with the know Aquarite issues (i.e. thermistors, cell failure patterns). I know there are other, possibly better, and certainly more expensive salt cell systems out there but this is the devil I know, not the devil I don't.
- I am planning to install a VS pump in the next weeks and look forward to cutting way back on my summer pump rpm and times.

I looked at the installation manual and it says the "preferred" cell location is downstream of the pool equipment. Not required, but "preferred". My existing one is installed just like that, but I have a nice section of of straight pipe just ahead of the heater I could install another cell without having to do anything more than minor surgery. And I might share one flow switch between the two Aquarites.

The question is:

Are there any issues with installing a cell upstream of the heater and downstream from all the other equipment? The heater is rarely on and I can't imagine the chlorine levels are high enough to matter that much?

Any knowledge anyone can impart on this idea? This is a simple fix instead of building a manifold set-up to support two cells where the existing one is.

Note, the Aquarite install manual even mentions the possibility of secondary Aquarites in a system so I assume this is not a trail-blazing idea.
 
I would not put the cell upstream of any equipment.

For an extra cell, you would also need an extra power supply.

With a variable speed pump, you can run it continuously for very little cost.

I would just run the pump longer and run the cell at 100%.
 
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