Thanks Poolsean - I didn't know the outside of the Jandy fit 2" - this save some space. I stopped a few pool stores and found a sleve that fits inside the 2" flow sensor and converts it to 1 1/2". I cut off the 1 1/2" pipe right at the Jandy and on the other side left a small peice of the 1 1/2" pipe (that will fit into the sleve which fits into the flow sensor). I decided to keep the flow sensor downstream because that it what is recomended and I would need 12" of straight pipe before it otherwise - I will see how it lasts.
I dry fitted everything and it fits - there is a little bit of presure from the flex (because there is less slack now) but i think it will be fine.
Got my water tested:
TDS 600
CYA 40
TC 5 (a little high because I turned up the clorinator to use the pucks inside)
FC 5
PH 7.2
TA 120
CH 165
(20,000 Gal IG Vinyl)
Picked up 10 x 20 kg of salt from Home Depot - added 160kg for now.
If the weather is good tomorrow I will glue up the plumbing and work on the electrical.

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The job looks great! You could have used a 2" 'street 90' off of the flow switch tee and then reduced that to the 1.5" flex and saved 2+" on the length. The street 90 has a regular socket on one side but the other is a 'slip' end and will go into any other 2" socket (like the out port of the flow sensor fitting).


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